Remove unessesary $ and fix some typos

src/ModelContextProtocol/Client/McpClient.cs

@@ -55,7 +55,7 @@ public McpClient(IClientTransport clientTransport, McpClientOptions? options, IL
             {
                 if (samplingCapability.SamplingHandler is not { } samplingHandler)
                 {
-                    throw new InvalidOperationException($"Sampling capability was set but it did not provide a handler.");
+                    throw new InvalidOperationException("Sampling capability was set but it did not provide a handler.");
                 }
 
                 RequestHandlers.Set(
@@ -72,7 +72,7 @@ public McpClient(IClientTransport clientTransport, McpClientOptions? options, IL
             {
                 if (rootsCapability.RootsHandler is not { } rootsHandler)
                 {
-                    throw new InvalidOperationException($"Roots capability was set but it did not provide a handler.");
+                    throw new InvalidOperationException("Roots capability was set but it did not provide a handler.");
                 }
 
                 RequestHandlers.Set(

src/ModelContextProtocol/Client/McpClientExtensions.cs

@@ -145,7 +145,7 @@ public static async Task<IList<McpClientTool>> ListToolsAsync(
     /// </para>
     /// <para>
     /// Every iteration through the returned <see cref="IAsyncEnumerable{McpClientTool}"/>
-    /// will result in requerying the server and yielding the sequence of available tools.
+    /// will result in re-querying the server and yielding the sequence of available tools.
     /// </para>
     /// </remarks>
     /// <example>
@@ -248,7 +248,7 @@ public static async Task<IList<McpClientPrompt>> ListPromptsAsync(
     /// </para>
     /// <para>
     /// Every iteration through the returned <see cref="IAsyncEnumerable{McpClientPrompt}"/>
-    /// will result in requerying the server and yielding the sequence of available prompts.
+    /// will result in re-querying the server and yielding the sequence of available prompts.
     /// </para>
     /// </remarks>
     /// <example>
@@ -396,7 +396,7 @@ public static async Task<IList<ResourceTemplate>> ListResourceTemplatesAsync(
     /// </para>
     /// <para>
     /// Every iteration through the returned <see cref="IAsyncEnumerable{ResourceTemplate}"/>
-    /// will result in requerying the server and yielding the sequence of available resource templates.
+    /// will result in re-querying the server and yielding the sequence of available resource templates.
     /// </para>
     /// </remarks>
     /// <example>
@@ -510,7 +510,7 @@ public static async Task<IList<Resource>> ListResourcesAsync(
     /// </para>
     /// <para>
     /// Every iteration through the returned <see cref="IAsyncEnumerable{Resource}"/>
-    /// will result in requerying the server and yielding the sequence of available resources.
+    /// will result in re-querying the server and yielding the sequence of available resources.
     /// </para>
     /// </remarks>
     /// <example>

src/ModelContextProtocol/Protocol/Messages/ProgressToken.cs

@@ -37,7 +37,7 @@ public ProgressToken(long value)
 
     /// <inheritdoc />
     public override string? ToString() =>
-        _token is string stringValue ? $"{stringValue}" :
+        _token is string stringValue ? stringValue :
         _token is long longValue ? longValue.ToString(CultureInfo.InvariantCulture) :
         null;
 

src/ModelContextProtocol/Server/AIFunctionMcpServerPrompt.cs

@@ -263,7 +263,7 @@ public override async ValueTask<GetPromptResult> GetAsync(
                 Messages = [.. chatMessages.SelectMany(chatMessage => chatMessage.ToPromptMessages())],
             },
 
-            null => throw new InvalidOperationException($"Null result returned from prompt function."),
+            null => throw new InvalidOperationException("Null result returned from prompt function."),
 
             _ => throw new InvalidOperationException($"Unknown result type '{result.GetType()}' returned from prompt function."),
         };