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docs/snippets/csharp/mcp_custom_client.md

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+```csharp title="C#"
+using System;
+using System.Diagnostics;
+using System.IO;
+using System.Threading.Tasks;
+
+var processInfo = new ProcessStartInfo
+{
+    FileName = "kreuzberg",
+    Arguments = "mcp",
+    UseShellExecute = false,
+    RedirectStandardInput = true,
+    RedirectStandardOutput = true,
+    RedirectStandardError = true
+};
+
+var process = Process.Start(processInfo);
+
+var clientInput = process.StandardInput;
+var clientOutput = process.StandardOutput;
+
+// Initialize session by sending initialize request
+var initRequest = new
+{
+    jsonrpc = "2.0",
+    id = 1,
+    method = "initialize",
+    parameters = new { }
+};
+
+await clientInput.WriteLineAsync(System.Text.Json.JsonSerializer.Serialize(initRequest));
+await clientInput.FlushAsync();
+
+var initResponse = await clientOutput.ReadLineAsync();
+Console.WriteLine($"Init response: {initResponse}");
+
+// List available tools
+var listRequest = new
+{
+    jsonrpc = "2.0",
+    id = 2,
+    method = "tools/list"
+};
+
+await clientInput.WriteLineAsync(System.Text.Json.JsonSerializer.Serialize(listRequest));
+await clientInput.FlushAsync();
+
+var listResponse = await clientOutput.ReadLineAsync();
+Console.WriteLine($"Available tools: {listResponse}");
+
+process?.WaitForExit();
+```