oberver pattern

DesignPattern/DesignPattern.sln

@@ -29,6 +29,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Iterator", "Iterator\Iterat
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Visitor", "Visitor\Visitor.csproj", "{A34872B5-83A1-4C3C-B20C-24A46DA39E3F}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Observer", "Observer\Observer.csproj", "{22E70ACA-E876-48E9-AB00-94FD359D0D82}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -87,6 +89,10 @@ Global
 		{A34872B5-83A1-4C3C-B20C-24A46DA39E3F}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{A34872B5-83A1-4C3C-B20C-24A46DA39E3F}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{A34872B5-83A1-4C3C-B20C-24A46DA39E3F}.Release|Any CPU.Build.0 = Release|Any CPU
+		{22E70ACA-E876-48E9-AB00-94FD359D0D82}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{22E70ACA-E876-48E9-AB00-94FD359D0D82}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{22E70ACA-E876-48E9-AB00-94FD359D0D82}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{22E70ACA-E876-48E9-AB00-94FD359D0D82}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

DesignPattern/Observer/App.config

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<configuration>
+    <startup> 
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.8.1" />
+    </startup>
+</configuration>

DesignPattern/Observer/Observer.csproj

@@ -0,0 +1,65 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{22E70ACA-E876-48E9-AB00-94FD359D0D82}</ProjectGuid>
+    <OutputType>Exe</OutputType>
+    <RootNamespace>Observer</RootNamespace>
+    <AssemblyName>Observer</AssemblyName>
+    <TargetFrameworkVersion>v4.8.1</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+    <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
+    <Deterministic>true</Deterministic>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Windows.Forms" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Data.DataSetExtensions" />
+    <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Net.Http" />
+    <Reference Include="System.Xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="TemperatureObserver\Temperature.cs" />
+    <Compile Include="TemperatureObserver\MainForm.cs">
+      <SubType>Form</SubType>
+    </Compile>
+    <Compile Include="TemperatureObserver\TemperatureClient.cs" />
+    <Compile Include="TemperatureObserver\TrackBarForm.cs">
+      <SubType>Form</SubType>
+    </Compile>
+    <Compile Include="TimerObserver\Observer.cs" />
+    <Compile Include="Program.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+    <Compile Include="TimerObserver\Subject.cs" />
+    <Compile Include="TimerObserver\TimerClient.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="App.config" />
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+</Project>

DesignPattern/Observer/Program.cs

@@ -0,0 +1,25 @@
+using Observer.TemperatureObserver;
+using Observer.TimerObserver;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace Observer
+{
+	/*
+	 * 카테고리: 행위 패턴
+	 * 개요: 객체의 변화를 그 객체를 의존하는 모든 다른 객체들에게 통지
+	 */
+	class Program
+	{
+		static void Main(string[] args)
+		{
+			//TimerClient.HowToTest(5);
+
+			TemperatureClient.HowToTest(10);
+		}
+	}
+}

DesignPattern/Observer/Properties/AssemblyInfo.cs

@@ -0,0 +1,36 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// 어셈블리에 대한 일반 정보는 다음 특성 집합을 통해 
+// 제어됩니다. 어셈블리와 관련된 정보를 수정하려면
+// 이러한 특성 값을 변경하세요.
+[assembly: AssemblyTitle("Observer")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("Observer")]
+[assembly: AssemblyCopyright("Copyright ©  2022")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// ComVisible을 false로 설정하면 이 어셈블리의 형식이 COM 구성 요소에 
+// 표시되지 않습니다. COM에서 이 어셈블리의 형식에 액세스하려면
+// 해당 형식에 대해 ComVisible 특성을 true로 설정하세요.
+[assembly: ComVisible(false)]
+
+// 이 프로젝트가 COM에 노출되는 경우 다음 GUID는 typelib의 ID를 나타냅니다.
+[assembly: Guid("22e70aca-e876-48e9-ab00-94fd359d0d82")]
+
+// 어셈블리의 버전 정보는 다음 네 가지 값으로 구성됩니다.
+//
+//      주 버전
+//      부 버전 
+//      빌드 번호
+//      수정 버전
+//
+// 모든 값을 지정하거나 아래와 같이 '*'를 사용하여 빌드 번호 및 수정 번호를
+// 기본값으로 할 수 있습니다.
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]

DesignPattern/Observer/TemperatureObserver/MainForm.cs

@@ -0,0 +1,42 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace Observer.TemperatureObserver
+{
+	class MainForm : Form
+	{
+		public static Temperature Temp { get; } = new Temperature();
+
+		private int timeout;
+		private TextBox textBox1;
+
+		public MainForm(int timeout)
+		{
+			this.timeout = timeout;
+			this.textBox1 = new TextBox();
+			this.Controls.Add(this.textBox1);
+
+			this.Load += TextBoxForm_Load;
+		}
+
+		private void TextBoxForm_Load(object sender, EventArgs e)
+		{
+			Temp.Changed += (s, eArgs) =>
+			{
+				this.Invoke(new Action(() =>
+				{
+					textBox1.Text = Temp.Fahrenheit.ToString();
+				}));
+			};
+
+			Form trackBarForm = new TrackBarForm();
+			trackBarForm.Show();
+
+			Task.Factory.StartNew(() => Temp.StartMeasure(timeout));
+		}
+	}
+}

DesignPattern/Observer/TemperatureObserver/Temperature.cs

@@ -0,0 +1,39 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace Observer.TemperatureObserver
+{
+	class Temperature
+	{
+		public event EventHandler Changed;
+
+		private float fahrenheit;
+		public float Fahrenheit
+		{
+			get { return this.fahrenheit; }
+			set
+			{
+				this.fahrenheit = value;
+				if (Changed == null)
+					return;
+
+				Changed(this, EventArgs.Empty);
+			}
+		}
+
+		public void StartMeasure(int times)
+		{
+			Random r = new Random(DateTime.Now.Millisecond);
+
+			for (int i = 0; i < times; i++)
+			{
+				this.Fahrenheit = r.Next(60, 70);
+				Thread.Sleep(1000);
+			}
+		}
+	}
+}

DesignPattern/Observer/TemperatureObserver/TemperatureClient.cs

@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace Observer.TemperatureObserver
+{
+	class TemperatureClient
+	{
+		public static void HowToTest(int timeout)
+		{
+			Application.Run(new MainForm(timeout));
+		}
+	}
+}

DesignPattern/Observer/TemperatureObserver/TrackBarForm.cs

@@ -0,0 +1,36 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace Observer.TemperatureObserver
+{
+	class TrackBarForm : Form
+	{
+		private TrackBar trackBar1;
+
+		public TrackBarForm()
+		{
+			this.trackBar1 = new TrackBar();
+			this.trackBar1.Maximum = 100;
+			this.Controls.Add(this.trackBar1);
+
+			this.Load += TrackBarForm_Load;
+		}
+
+		private void TrackBarForm_Load(object sender, EventArgs e)
+		{
+			Temperature t = MainForm.Temp;
+
+			t.Changed += (s, eArgs) =>
+			{
+				this.Invoke(new Action(() =>
+				{
+					trackBar1.Value = (int)t.Fahrenheit % 100;
+				}));
+			};
+		}
+	}
+}

DesignPattern/Observer/TimerObserver/Observer.cs

@@ -0,0 +1,29 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using System.Timers;
+
+namespace Observer.TimerObserver
+{
+	class Observer
+	{
+		private Subject subject = new Subject();
+		private string status;
+
+		public void Test()
+		{
+			subject.Changed += Subject_Changed;
+		}
+
+		private void Subject_Changed(object sender, EventArgs e)
+		{
+			ElapsedEventArgs eArgs = e as ElapsedEventArgs;
+			DateTime signalTime = eArgs == null ? DateTime.Now : eArgs.SignalTime;
+			status = $"Subject updated at {signalTime}";
+			Console.WriteLine(status);
+		}
+	}
+}

DesignPattern/Observer/TimerObserver/Subject.cs

@@ -0,0 +1,29 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Timers;
+
+namespace Observer.TimerObserver
+{
+	class Subject
+	{
+		public event EventHandler Changed;
+
+		public Subject()
+		{
+			Timer timer = new Timer(1000);
+			timer.Elapsed += Timer_Elapsed;
+			timer.Start();
+		}
+
+		private void Timer_Elapsed(object sender, ElapsedEventArgs e)
+		{
+			if (Changed == null)
+				return;
+
+			Changed(this, e);
+		}
+	}
+}

DesignPattern/Observer/TimerObserver/TimerClient.cs

@@ -0,0 +1,26 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace Observer.TimerObserver
+{
+	class TimerClient
+	{
+		public static void HowToTest(int timeout)
+		{
+			int t = 0;
+
+			Observer observer = new Observer();
+			observer.Test();
+
+			while (t <= timeout)
+			{
+				Thread.Sleep(1000);
+				t++;
+			}
+		}
+	}
+}

DesignPattern/Observer_Form/App.config

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<configuration>
+    <startup> 
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.8.1" />
+    </startup>
+</configuration>

DesignPattern/Observer_Form/Form1.Designer.cs

@@ -0,0 +1,41 @@
+
+namespace Observer_Form
+{
+	partial class Form1
+	{
+		/// <summary>
+		/// 필수 디자이너 변수입니다.
+		/// </summary>
+		private System.ComponentModel.IContainer components = null;
+
+		/// <summary>
+		/// 사용 중인 모든 리소스를 정리합니다.
+		/// </summary>
+		/// <param name="disposing">관리되는 리소스를 삭제해야 하면 true이고, 그렇지 않으면 false입니다.</param>
+		protected override void Dispose(bool disposing)
+		{
+			if (disposing && (components != null))
+			{
+				components.Dispose();
+			}
+			base.Dispose(disposing);
+		}
+
+		#region Windows Form 디자이너에서 생성한 코드
+
+		/// <summary>
+		/// 디자이너 지원에 필요한 메서드입니다. 
+		/// 이 메서드의 내용을 코드 편집기로 수정하지 마세요.
+		/// </summary>
+		private void InitializeComponent()
+		{
+			this.components = new System.ComponentModel.Container();
+			this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
+			this.ClientSize = new System.Drawing.Size(800, 450);
+			this.Text = "Form1";
+		}
+
+		#endregion
+	}
+}
+

DesignPattern/Observer_Form/Form1.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace Observer_Form
+{
+	public partial class Form1 : Form
+	{
+		public Form1()
+		{
+			InitializeComponent();
+		}
+	}
+}

DesignPattern/Observer_Form/Form1.resx

@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>

DesignPattern/Observer_Form/Observer_Form.csproj

@@ -0,0 +1,80 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{892B1651-A7FF-4B8F-8400-60B8B9F55A67}</ProjectGuid>
+    <OutputType>WinExe</OutputType>
+    <RootNamespace>Observer_Form</RootNamespace>
+    <AssemblyName>Observer_Form</AssemblyName>
+    <TargetFrameworkVersion>v4.8.1</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+    <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
+    <Deterministic>true</Deterministic>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Data.DataSetExtensions" />
+    <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Deployment" />
+    <Reference Include="System.Drawing" />
+    <Reference Include="System.Net.Http" />
+    <Reference Include="System.Windows.Forms" />
+    <Reference Include="System.Xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="Form1.cs">
+      <SubType>Form</SubType>
+    </Compile>
+    <Compile Include="Form1.Designer.cs">
+      <DependentUpon>Form1.cs</DependentUpon>
+    </Compile>
+    <Compile Include="Program.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+    <EmbeddedResource Include="Properties\Resources.resx">
+      <Generator>ResXFileCodeGenerator</Generator>
+      <LastGenOutput>Resources.Designer.cs</LastGenOutput>
+      <SubType>Designer</SubType>
+    </EmbeddedResource>
+    <Compile Include="Properties\Resources.Designer.cs">
+      <AutoGen>True</AutoGen>
+      <DependentUpon>Resources.resx</DependentUpon>
+    </Compile>
+    <None Include="Properties\Settings.settings">
+      <Generator>SettingsSingleFileGenerator</Generator>
+      <LastGenOutput>Settings.Designer.cs</LastGenOutput>
+    </None>
+    <Compile Include="Properties\Settings.Designer.cs">
+      <AutoGen>True</AutoGen>
+      <DependentUpon>Settings.settings</DependentUpon>
+      <DesignTimeSharedInput>True</DesignTimeSharedInput>
+    </Compile>
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="App.config" />
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+</Project>

DesignPattern/Observer_Form/Program.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace Observer_Form
+{
+	static class Program
+	{
+		/// <summary>
+		/// 해당 애플리케이션의 주 진입점입니다.
+		/// </summary>
+		[STAThread]
+		static void Main()
+		{
+			Application.EnableVisualStyles();
+			Application.SetCompatibleTextRenderingDefault(false);
+			Application.Run(new Form1());
+		}
+	}
+}

DesignPattern/Observer_Form/Properties/AssemblyInfo.cs

@@ -0,0 +1,36 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// 어셈블리에 대한 일반 정보는 다음 특성 집합을 통해 
+// 제어됩니다. 어셈블리와 관련된 정보를 수정하려면
+// 이러한 특성 값을 변경하세요.
+[assembly: AssemblyTitle("Observer_Form")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("Observer_Form")]
+[assembly: AssemblyCopyright("Copyright ©  2022")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// ComVisible을 false로 설정하면 이 어셈블리의 형식이 COM 구성 요소에 
+// 표시되지 않습니다. COM에서 이 어셈블리의 형식에 액세스하려면
+// 해당 형식에 대해 ComVisible 특성을 true로 설정하세요.
+[assembly: ComVisible(false)]
+
+// 이 프로젝트가 COM에 노출되는 경우 다음 GUID는 typelib의 ID를 나타냅니다.
+[assembly: Guid("892b1651-a7ff-4b8f-8400-60b8b9f55a67")]
+
+// 어셈블리의 버전 정보는 다음 네 가지 값으로 구성됩니다.
+//
+//      주 버전
+//      부 버전 
+//      빌드 번호
+//      수정 버전
+//
+// 모든 값을 지정하거나 아래와 같이 '*'를 사용하여 빌드 번호 및 수정 번호를
+// 기본값으로 할 수 있습니다.
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]

DesignPattern/Observer_Form/Properties/Resources.Designer.cs

@@ -0,0 +1,70 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     이 코드는 도구를 사용하여 생성되었습니다.
+//     런타임 버전:4.0.30319.42000
+//
+//     파일 내용을 변경하면 잘못된 동작이 발생할 수 있으며, 코드를 다시 생성하면
+//     이러한 변경 내용이 손실됩니다.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+
+namespace Observer_Form.Properties
+{
+	/// <summary>
+	///   지역화된 문자열 등을 찾기 위한 강력한 형식의 리소스 클래스입니다.
+	/// </summary>
+	// 이 클래스는 ResGen 또는 Visual Studio와 같은 도구를 통해 StronglyTypedResourceBuilder
+	// 클래스에서 자동으로 생성되었습니다.
+	// 멤버를 추가하거나 제거하려면 .ResX 파일을 편집한 다음 /str 옵션을 사용하여
+	// ResGen을 다시 실행하거나 VS 프로젝트를 다시 빌드하십시오.
+	[global::System.CodeDom.Compiler.GeneratedCodeAttribute("System.Resources.Tools.StronglyTypedResourceBuilder", "4.0.0.0")]
+	[global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
+	[global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
+	internal class Resources
+	{
+
+		private static global::System.Resources.ResourceManager resourceMan;
+
+		private static global::System.Globalization.CultureInfo resourceCulture;
+
+		[global::System.Diagnostics.CodeAnalysis.SuppressMessageAttribute("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
+		internal Resources()
+		{
+		}
+
+		/// <summary>
+		///   이 클래스에서 사용하는 캐시된 ResourceManager 인스턴스를 반환합니다.
+		/// </summary>
+		[global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
+		internal static global::System.Resources.ResourceManager ResourceManager
+		{
+			get
+			{
+				if ((resourceMan == null))
+				{
+					global::System.Resources.ResourceManager temp = new global::System.Resources.ResourceManager("Observer_Form.Properties.Resources", typeof(Resources).Assembly);
+					resourceMan = temp;
+				}
+				return resourceMan;
+			}
+		}
+
+		/// <summary>
+		///   이 강력한 형식의 리소스 클래스를 사용하여 모든 리소스 조회에 대해 현재 스레드의 CurrentUICulture 속성을
+		///   재정의합니다.
+		/// </summary>
+		[global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
+		internal static global::System.Globalization.CultureInfo Culture
+		{
+			get
+			{
+				return resourceCulture;
+			}
+			set
+			{
+				resourceCulture = value;
+			}
+		}
+	}
+}

DesignPattern/Observer_Form/Properties/Resources.resx

@@ -0,0 +1,117 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>

DesignPattern/Observer_Form/Properties/Settings.Designer.cs

@@ -0,0 +1,29 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by a tool.
+//     Runtime Version:4.0.30319.42000
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+
+namespace Observer_Form.Properties
+{
+	[global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
+	[global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator", "11.0.0.0")]
+	internal sealed partial class Settings : global::System.Configuration.ApplicationSettingsBase
+	{
+
+		private static Settings defaultInstance = ((Settings)(global::System.Configuration.ApplicationSettingsBase.Synchronized(new Settings())));
+
+		public static Settings Default
+		{
+			get
+			{
+				return defaultInstance;
+			}
+		}
+	}
+}

DesignPattern/Observer_Form/Properties/Settings.settings

@@ -0,0 +1,7 @@
+<?xml version='1.0' encoding='utf-8'?>
+<SettingsFile xmlns="http://schemas.microsoft.com/VisualStudio/2004/01/settings" CurrentProfile="(Default)">
+  <Profiles>
+    <Profile Name="(Default)" />
+  </Profiles>
+  <Settings />
+</SettingsFile>

DesignPattern/Observer_Form/Temperature.cs

@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Observer_Form
+{
+	class Temperature
+	{
+	}
+}