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…e old constructor - Add new RequestContext(McpServer, JsonRpcRequest, TParams) constructor - Obsolete the old parameterless constructor - Change Params property from TParams? to TParams - Update all production code to use non-nullable Params - Update RequestHandlers.Set to use non-null TParams - Update InvokeHandlerAsync to use new constructor Co-authored-by: halter73 <54385+halter73@users.noreply.github.com> Agent-Logs-Url: https://github.com/modelcontextprotocol/csharp-sdk/sessions/a857ef9f-506e-4046-a2c2-d268cfc65701
Update all test files to use the new 3-arg RequestContext constructor (server, jsonRpcRequest, params) instead of the old 2-arg constructor with property initializer for Params. Changes: - Move Params from object initializer to constructor argument - Change .Params?. to .Params. on RequestContext variables - Fix request?.Params?.X to request?.Params.X - Remove dead null checks on non-nullable value type Level - Add required Name/Uri properties to default params instances Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: halter73 <54385+halter73@users.noreply.github.com> Agent-Logs-Url: https://github.com/modelcontextprotocol/csharp-sdk/sessions/a857ef9f-506e-4046-a2c2-d268cfc65701
When a client omits the "params" field from a JSON-RPC message, JsonSerializer.Deserialize returns null. Since RequestContext.Params is now non-nullable, we need to deserialize from an empty JSON object instead to get a valid default TParams instance. Co-authored-by: halter73 <54385+halter73@users.noreply.github.com> Agent-Logs-Url: https://github.com/modelcontextprotocol/csharp-sdk/sessions/1e9aed1a-2748-4117-987c-611e23751bea
…HandlerAsync constructor change The previous commits removed null-conditional operators (?.) from handler lambdas in McpServerImpl.cs, but at runtime TParams can still be null when JSON-RPC params is missing. Also reverts the EmptyJsonObject fallback in RequestHandlers.cs which failed for types with required constructor params. Restores defensive null-conditional access in all handler lambdas while keeping the desired API changes: TParams (non-nullable) InvokeHandlerAsync signature and the new 3-arg RequestContext constructor. Co-authored-by: halter73 <54385+halter73@users.noreply.github.com> Agent-Logs-Url: https://github.com/modelcontextprotocol/csharp-sdk/sessions/74aa9308-d4cf-4669-86b4-1a680d0676b4
…constructor - Rename the `@params` constructor parameter to `parameters` in the 3-arg RequestContext<TParams> constructor. - Add MCP9003 diagnostic ID to Obsoletions.cs for the obsolete 2-arg constructor, following the established pattern (Message, DiagnosticId, UrlFormat). - Update the [Obsolete] attribute to use the centralized constants with DiagnosticId and UrlFormat. - Document MCP9003 in docs/list-of-diagnostics.md. Co-authored-by: halter73 <54385+halter73@users.noreply.github.com> Agent-Logs-Url: https://github.com/modelcontextprotocol/csharp-sdk/sessions/6e17cd63-6cb0-4d77-ba6c-1f2a616fa03f
Copilot created this pull request from a session on behalf of
halter73
March 23, 2026 18:54
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…s returning CallToolResult (#1425) Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com> Co-authored-by: stephentoub <2642209+stephentoub@users.noreply.github.com> Co-authored-by: Stephen Toub <stoub@microsoft.com> Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
…1438) Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com> Co-authored-by: Stephen Toub <stoub@microsoft.com>
Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
…null-forgiving operator usage Co-authored-by: halter73 <54385+halter73@users.noreply.github.com> Agent-Logs-Url: https://github.com/modelcontextprotocol/csharp-sdk/sessions/43f266c7-392e-40c4-a808-759fb46d04d5
halter73
changed the title
@params to parameters and add proper obsoletion for 2-arg RequestContext constructor…d-requestcontext-const # Conflicts: # tests/ModelContextProtocol.Tests/Server/McpServerToolTests.cs
stephentoub
reviewed
Mar 23, 2026
stephentoub
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Mar 26, 2026
src/ModelContextProtocol.Core/Server/AIFunctionMcpServerPrompt.cs
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…in src/ Agent-Logs-Url: https://github.com/modelcontextprotocol/csharp-sdk/sessions/57676fa6-299c-40eb-ba0b-a7cbedbcef91 Co-authored-by: stephentoub <2642209+stephentoub@users.noreply.github.com>
halter73
approved these changes
Mar 26, 2026
…-conditionals) Agent-Logs-Url: https://github.com/modelcontextprotocol/csharp-sdk/sessions/e4a931bf-4543-4726-8897-54dcc66e354d Co-authored-by: stephentoub <2642209+stephentoub@users.noreply.github.com>
stephentoub
approved these changes
Mar 26, 2026
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