diff --git a/Echo/Client/Client.cs b/Echo/Client/Client.cs
new file mode 100644
index 0000000..d2e52de
--- /dev/null
+++ b/Echo/Client/Client.cs
@@ -0,0 +1,38 @@
+using System.Net;
+using System.Net.Sockets;
+using System.Text;
+
+namespace Client;
+
+internal class Client
+{
+	static void Main(string[] args)
+	{
+		using (Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp))
+		{
+			IPEndPoint endPoint = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 20000);
+			socket.Connect(endPoint);
+
+			while (true)
+			{
+				string str = Console.ReadLine();
+				if (str == "exit")
+					return;
+
+				byte[] buffer = Encoding.UTF8.GetBytes(str);
+				socket.Send(buffer);
+
+				byte[] buffer2 = new byte[256];
+				int byteRead = socket.Receive(buffer2);
+				if (byteRead < 1)
+				{
+					Console.WriteLine("Disconnecting server...");
+					return;
+				}
+
+				string str2 = Encoding.UTF8.GetString(buffer2);
+				Console.WriteLine($"[Receive] {str2}");
+			}
+		}
+	}
+}
\ No newline at end of file
diff --git a/Echo/Client/Client.csproj b/Echo/Client/Client.csproj
new file mode 100644
index 0000000..74abf5c
--- /dev/null
+++ b/Echo/Client/Client.csproj
@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>
diff --git a/Echo/Echo.sln b/Echo/Echo.sln
new file mode 100644
index 0000000..3cb2965
--- /dev/null
+++ b/Echo/Echo.sln
@@ -0,0 +1,31 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.3.32929.385
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Server", "Server\Server.csproj", "{E8C28E9B-3C0F-4A89-9F95-FB078E7B1D81}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Client", "Client\Client.csproj", "{224CAEA2-AA8A-4DA7-AE3C-F9BE71938D63}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{E8C28E9B-3C0F-4A89-9F95-FB078E7B1D81}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{E8C28E9B-3C0F-4A89-9F95-FB078E7B1D81}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{E8C28E9B-3C0F-4A89-9F95-FB078E7B1D81}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{E8C28E9B-3C0F-4A89-9F95-FB078E7B1D81}.Release|Any CPU.Build.0 = Release|Any CPU
+		{224CAEA2-AA8A-4DA7-AE3C-F9BE71938D63}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{224CAEA2-AA8A-4DA7-AE3C-F9BE71938D63}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{224CAEA2-AA8A-4DA7-AE3C-F9BE71938D63}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{224CAEA2-AA8A-4DA7-AE3C-F9BE71938D63}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {1B391772-9687-4A60-8A3B-A725F424A383}
+	EndGlobalSection
+EndGlobal
diff --git a/Echo/Echo/Echo.csproj b/Echo/Echo/Echo.csproj
new file mode 100644
index 0000000..74abf5c
--- /dev/null
+++ b/Echo/Echo/Echo.csproj
@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>
diff --git a/Echo/Echo/Program.cs b/Echo/Echo/Program.cs
new file mode 100644
index 0000000..ed4b97f
--- /dev/null
+++ b/Echo/Echo/Program.cs
@@ -0,0 +1,10 @@
+namespace Echo
+{
+	internal class Program
+	{
+		static void Main(string[] args)
+		{
+			Console.WriteLine("Hello, World!");
+		}
+	}
+}
\ No newline at end of file
diff --git a/Echo/Server/Server.cs b/Echo/Server/Server.cs
new file mode 100644
index 0000000..1308f1f
--- /dev/null
+++ b/Echo/Server/Server.cs
@@ -0,0 +1,39 @@
+using System.Net;
+using System.Net.Sockets;
+using System.Text;
+
+namespace Server;
+
+internal class Server
+{
+	static void Main(string[] args)
+	{
+		using (Socket serverSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp))
+		{
+			IPEndPoint endPoint = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 20000);
+			serverSocket.Bind(endPoint);
+			serverSocket.Listen(20);
+
+			using (Socket clientSocket = serverSocket.Accept())
+			{
+				Console.WriteLine(clientSocket.RemoteEndPoint);
+
+				while (true)
+				{
+					byte[] buffer = new byte[256];
+					int totalBytes = clientSocket.Receive(buffer);
+					if (totalBytes < 1)
+					{
+						Console.WriteLine("Disconnecting client...");
+						return;
+					}
+
+					string str = Encoding.UTF8.GetString(buffer);
+					Console.WriteLine(str);
+
+					clientSocket.Send(buffer);
+				}
+			}
+		}
+	}
+}
\ No newline at end of file
diff --git a/Echo/Server/Server.csproj b/Echo/Server/Server.csproj
new file mode 100644
index 0000000..74abf5c
--- /dev/null
+++ b/Echo/Server/Server.csproj
@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>