Microsoft.diagnosticshub.diagnostics.collectionstartfailedhubexception May 2026

catch (DiagnosticsCollectionStartFailedHubException ex)

1. Overview & Context The exception microsoft.diagnosticshub.diagnostics.collectionstartfailedhubexception is a specific, platform-level error originating from Microsoft’s Diagnostic Hub —a component primarily used within Visual Studio and other Microsoft developer tools (like Performance Profiler, CPU Usage tool, Memory Usage tool, and IntelliTrace). catch (DiagnosticsCollectionStartFailedHubException ex) 1

Shut down other profilers, performance monitors, or secondary Visual Studio instances debugging the same process. try | Aspect | Detail | |--------|--------| |

try

| Aspect | Detail | |--------|--------| | Type | Developer-environment exception, not production code | | Primary source | Visual Studio Diagnostic Tools | | Meaning | Failed to begin collecting performance/debug data from a target process | | Most common fix | Run VS as admin, close other profilers, repair VS | | Inner exception significance | High – reveals actual system-level failure | This exception is a diagnostic failure of a diagnostic tool—an ironic but informative error that typically points to environment or permission issues rather than a bug in your application code. close other profilers

If the target process requires elevation, launch Visual Studio with admin rights ( Right-click → Run as administrator ).

Console.WriteLine($"Diagnostic collection failed: ex.Message"); if (ex.InnerException is UnauthorizedAccessException) Console.WriteLine("Try running Visual Studio as Administrator."); // Log to telemetry or retry with fallback configuration