Add EverythingServer sample (#151)

src/ModelContextProtocol/Configuration/McpServerBuilderExtensions.cs

@@ -314,7 +314,7 @@ public static partial class McpServerBuilderExtensions
     }
 
     /// <summary>
-    /// Sets or sets the handler for subscribe to resources messages.
+    /// Sets the handler for subscribe to resources messages.
     /// </summary>
     /// <param name="builder">The builder instance.</param>
     /// <param name="handler">The handler.</param>
@@ -325,6 +325,18 @@ public static partial class McpServerBuilderExtensions
         builder.Services.Configure<McpServerHandlers>(s => s.UnsubscribeFromResourcesHandler = handler);
         return builder;
     }
+
+    /// <summary>
+    /// Sets the handler for setting the logging level.
+    /// </summary>
+    /// <param name="builder">The builder instance.</param>
+    /// <param name="handler">The handler.</param>
+    public static IMcpServerBuilder WithSetLoggingLevelHandler(this IMcpServerBuilder builder, Func<RequestContext<SetLevelRequestParams>, CancellationToken, Task<EmptyResult>> handler)
+    {
+        Throw.IfNull(builder);
+        builder.Services.Configure<McpServerHandlers>(s => s.SetLoggingLevelHandler = handler);
+        return builder;
+    }
     #endregion
 
     #region Transports

src/ModelContextProtocol/Server/McpServerHandlers.cs

@@ -113,6 +113,7 @@ public sealed class McpServerHandlers
         options.Capabilities.Prompts = promptsCapability;
         options.Capabilities.Resources = resourcesCapability;
         options.Capabilities.Tools = toolsCapability;
+        options.Capabilities.Logging = loggingCapability;
 
         options.GetCompletionHandler = GetCompletionHandler ?? options.GetCompletionHandler;
     }