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Add 3-arg RequestContext constructor and obsolete 2-arg to eliminate null-forgiving operator usage (#1462)

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Copilot 2026-03-27 12:33:23 -07:00 • committed by GitHub
commit 7dcdbafe9d
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6 changed files with 190 additions and 219 deletions
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4
docs/concepts/filters.md
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@ -317,7 +317,7 @@ Execution flow: `filter1 -> filter2 -> filter3 -> baseHandler -> filter3 -> filt
{
var logger = context.Services?.GetService<ILogger<Program>>();
logger?.LogInformation($"Processing request from {context.Params?.ProgressToken}");
logger?.LogInformation($"Processing request from {context.Params.ProgressToken}");
var result = await next(context, cancellationToken);
logger?.LogInformation($"Returning {result.Tools?.Count ?? 0} tools");
return result;
@ -339,7 +339,7 @@ Execution flow: `filter1 -> filter2 -> filter3 -> baseHandler -> filter3 -> filt
catch (Exception ex)
{
var logger = context.Services?.GetService<ILogger<Program>>();
logger?.LogError(ex, "Error while processing CallTool request for {ProgressToken}", context.Params?.ProgressToken);
logger?.LogError(ex, "Error while processing CallTool request for {ProgressToken}", context.Params.ProgressToken);
return new CallToolResult
{

2
docs/concepts/logging/samples/server/Tools/LoggingTools.cs
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@ -13,7 +13,7 @@ public class LoggingTools
int duration = 10,
int steps = 10)
{
var progressToken = context.Params?.ProgressToken;
var progressToken = context.Params.ProgressToken;
var stepDuration = duration / steps;
// <snippet_LoggingConfiguration >

2
docs/concepts/pagination/pagination.md
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@ -77,7 +77,7 @@ builder.Services.AddMcpServer()
int startIndex = 0;
// Parse cursor to determine starting position
if (ctx.Params?.Cursor is { } cursor)
if (ctx.Params.Cursor is { } cursor)
{
startIndex = int.Parse(cursor);
}

2
docs/concepts/progress/samples/server/Tools/LongRunningTools.cs
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@ -15,7 +15,7 @@ public class LongRunningTools
int duration = 10,
int steps = 5)
{
var progressToken = context.Params?.ProgressToken;
var progressToken = context.Params.ProgressToken;
var stepDuration = duration / steps;
for (int i = 1; i <= steps; i++)

4
docs/concepts/resources/resources.md
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@ -212,7 +212,7 @@ builder.Services.AddMcpServer()
.WithResources<MyResources>()
.WithSubscribeToResourcesHandler(async (ctx, ct) =>
{
if (ctx.Params?.Uri is { } uri)
if (ctx.Params.Uri is { } uri)
{
// Track the subscription (e.g., in a concurrent dictionary)
subscriptions[ctx.Server.SessionId].TryAdd(uri, 0);
@ -221,7 +221,7 @@ builder.Services.AddMcpServer()
})
.WithUnsubscribeFromResourcesHandler(async (ctx, ct) =>
{
if (ctx.Params?.Uri is { } uri)
if (ctx.Params.Uri is { } uri)
{
subscriptions[ctx.Server.SessionId].TryRemove(uri, out _);
}

1
docs/list-of-diagnostics.md
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@ -36,3 +36,4 @@ When APIs are marked as obsolete, a diagnostic is emitted to warn users that the
| :------------ | :----- | :---------- |
| `MCP9001` | In place | The `EnumSchema` and `LegacyTitledEnumSchema` APIs are deprecated as of specification version 2025-11-25. Use the current schema APIs instead. |
| `MCP9002` | Removed | The `AddXxxFilter` extension methods on `IMcpServerBuilder` (e.g., `AddListToolsFilter`, `AddCallToolFilter`, `AddIncomingMessageFilter`) were superseded by `WithRequestFilters()` and `WithMessageFilters()`. |
| `MCP9003` | In place | The `RequestContext<TParams>(McpServer, JsonRpcRequest)` constructor is obsolete. Use the overload that accepts a `parameters` argument: `RequestContext<TParams>(McpServer, JsonRpcRequest, TParams)`. |