generic compatible

EffectiveCSharp/EffectiveCSharp.sln

@@ -0,0 +1,25 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.8.34511.84
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "EffectiveCSharp", "EffectiveCSharp\EffectiveCSharp.csproj", "{1B79263C-F9E0-4FAC-8550-E91173EB3A2F}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{1B79263C-F9E0-4FAC-8550-E91173EB3A2F}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{1B79263C-F9E0-4FAC-8550-E91173EB3A2F}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{1B79263C-F9E0-4FAC-8550-E91173EB3A2F}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{1B79263C-F9E0-4FAC-8550-E91173EB3A2F}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {18E619C9-0514-4336-A32F-36E7B1205A92}
+	EndGlobalSection
+EndGlobal

EffectiveCSharp/EffectiveCSharp/EffectiveCSharp.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

EffectiveCSharp/EffectiveCSharp/LanguageComponent/CallEvent.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace EffectiveCSharp.LanguageComponent
+{
+    internal class CallEvent
+    {
+        public event EventHandler<string> Event;
+
+        public void Work()
+        {
+            int cnt = 0;
+            while (cnt < 10)
+            {
+                cnt++;
+                RaiseUpdate(cnt.ToString());
+
+                Thread.Sleep(1000);
+            }
+        }
+
+        private void RaiseUpdate(string contents)
+        {
+            Event?.Invoke(this, contents);
+        }
+    }
+}

EffectiveCSharp/EffectiveCSharp/Program.cs

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+using EffectiveCSharp.LanguageComponent;
+using EffectiveCSharp.UseGeneric;
+
+namespace EffectiveCSharp
+{
+    internal class Program
+    {
+        static void Main(string[] args)
+        {
+            GenericCompatible.AreEqual(new { test = 1 }, new { test = 2 });
+            GenericCompatible.BetterAreEqual(new { test = 1 }, new { test = 2 }); // 컴파일 타임 체크 가능
+
+            //CallEvent callEvent = new CallEvent();
+            //callEvent.Event += (s, e) => Console.WriteLine(e);
+            //callEvent.Work();
+        }
+
+    }
+}

EffectiveCSharp/EffectiveCSharp/UseGeneric/GenericCompatible.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace EffectiveCSharp.UseGeneric
+{
+    internal class GenericCompatible
+    {
+        public static bool AreEqual<T>(T left, T right)
+        {
+            if (left == null)
+                return right == null;
+
+            if (left is IComparable<T>)
+            {
+                IComparable<T> lval = left as IComparable<T>;
+                if (right is IComparable<T>)
+                    return lval.CompareTo(right) == 0;
+                else
+                    throw new ArgumentException("Type does not implement IComparable<T>", nameof(right));
+            }
+            else
+            {
+                    throw new ArgumentException("Type does not implement IComparable<T>", nameof(left));
+            }
+        }
+
+        public static bool BetterAreEqual<T>(T left, T right) where T : IComparable<T>
+        {
+            return left.CompareTo(right) == 0;
+        }
+    }
+}