CLR Activation Debugging Diagnose .NET Framework runtime activation issues by analyzing CLR activation logs (CLRLoad logs) produced by the shim (mscoree.dll). These logs record every decision the shim makes when selecting and loading a CLR version. When to Use - A process fails to load the CLR at all ("Unable to find a version of the runtime to use") - The shim picks the wrong CLR version (e.g., v2.0 instead of v4.0) - Unexpected .NET 3.5 Feature-on-Demand (FOD) install dialogs appear - FOD dialogs are expected but do NOT appear - Both CLR v2 and CLR v4 load into the same process, causing fai…