Add McpClient/Session methods using .Protocol types (#1063)

src/ModelContextProtocol.Core/Protocol/ElicitRequestParams.cs

@@ -391,7 +391,7 @@ public sealed class ElicitRequestParams : RequestParams
                 return psd;
             }
 
-            private static IList<EnumSchemaOption> DeserializeEnumOptions(ref Utf8JsonReader reader)
+            private static List<EnumSchemaOption> DeserializeEnumOptions(ref Utf8JsonReader reader)
             {
                 if (reader.TokenType != JsonTokenType.StartArray)
                 {

src/ModelContextProtocol.Core/Protocol/ProgressToken.cs

@@ -13,6 +13,7 @@ public readonly struct ProgressToken : IEquatable<ProgressToken>
 {
     /// <summary>Initializes a new instance of the <see cref="ProgressToken"/> with a specified value.</summary>
     /// <param name="value">The required ID value.</param>
+    /// <exception cref="ArgumentNullException"><paramref name="value"/> is <see langword="null"/>.</exception>
     public ProgressToken(string value)
     {
         Throw.IfNull(value);

src/ModelContextProtocol.Core/Protocol/Reference.cs

@@ -12,8 +12,8 @@ namespace ModelContextProtocol.Protocol;
 /// </summary>
 /// <remarks>
 /// <para>
-/// References are commonly used with <see cref="McpClient.CompleteAsync"/> to request completion suggestions for arguments,
-/// and with other methods that need to reference resources or prompts.
+/// References are commonly used with <see cref="McpClient.CompleteAsync(Reference, string, string, ModelContextProtocol.RequestOptions?, CancellationToken)"/>
+/// to request completion suggestions for arguments, and with other methods that need to reference resources or prompts.
 /// </para>
 /// <para>
 /// See the <see href="https://github.com/modelcontextprotocol/specification/blob/main/schema/">schema</see> for details.

src/ModelContextProtocol.Core/Protocol/RequestId.cs

@@ -13,6 +13,7 @@ public readonly struct RequestId : IEquatable<RequestId>
 {
     /// <summary>Initializes a new instance of the <see cref="RequestId"/> with a specified value.</summary>
     /// <param name="value">The required ID value.</param>
+    /// <exception cref="ArgumentNullException"><paramref name="value"/> is <see langword="null"/>.</exception>
     public RequestId(string value)
     {
         Throw.IfNull(value);

src/ModelContextProtocol.Core/Protocol/TransportBase.cs

@@ -94,6 +94,8 @@ public abstract partial class TransportBase : ITransport
             throw new InvalidOperationException("Transport is not connected.");
         }
 
+        cancellationToken.ThrowIfCancellationRequested();
+
         if (_logger.IsEnabled(LogLevel.Debug))
         {
             var messageId = (message as JsonRpcMessageWithId)?.Id.ToString() ?? "(no id)";