Release v1.3.0 (#1566)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: jeffhandley

docs/concepts/stateless/stateless.md

@@ -279,7 +279,7 @@ This is entirely automatic — you don't need to manage the session ID yourself.
 
 The server can terminate a session at any time — due to idle timeout, max session count exceeded, explicit shutdown, or any server-side policy. When this happens, subsequent requests with that session ID receive HTTP `404`. The client detects this and:
 
-1. Wraps the failure in a `TransportClosedException` with <xref:ModelContextProtocol.Client.HttpClientCompletionDetails> containing the HTTP status code
+1. Wraps the failure in a <xref:ModelContextProtocol.Client.ClientTransportClosedException> with <xref:ModelContextProtocol.Client.HttpClientCompletionDetails> containing the HTTP status code
 2. Cancels all in-flight operations
 3. Completes the <xref:ModelContextProtocol.Client.McpClient.Completion> task
 

src/Directory.Build.props

@@ -5,7 +5,7 @@
     <PackageProjectUrl>https://csharp.sdk.modelcontextprotocol.io</PackageProjectUrl>
     <RepositoryUrl>https://github.com/modelcontextprotocol/csharp-sdk</RepositoryUrl>
     <RepositoryType>git</RepositoryType>
-    <VersionPrefix>1.2.0</VersionPrefix>
+    <VersionPrefix>1.3.0</VersionPrefix>
     <Authors>ModelContextProtocol</Authors>
     <Copyright>© Model Context Protocol a Series of LF Projects, LLC.</Copyright>
     <PackageTags>ModelContextProtocol;mcp;ai;llm</PackageTags>