Microsoft.Diagnostics.Runtime.dll also called "ClrMD" is a process and crash dump introspection library. This allows you to write tools and debugger plugins which can do thing similar to SOS and PSSCOR.

For more details, take a look at the GettingStarted guide, FAQ, and Samples.

For information on migrating from ClrMD 2.0 -> 2.1 please take a look at Migrating21.

Latest package is available from Azure DevOps public feed: https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-tools/nuget/v3/index.json (browse).