Comment by SigmundA
GetElementId makes sure its a NCName and makes sure its unique regardless, you can view the source here: https://github.com/dotnet/runtime/blob/c4d7f7c6f2e2f34f07e64...
GetElementId makes sure its a NCName and makes sure its unique regardless, you can view the source here: https://github.com/dotnet/runtime/blob/c4d7f7c6f2e2f34f07e64...