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).