Throw a custom Exception in Remoting, inner exception will be the serialized exception from user service code.

[amanbha]

currently the code throws the exception directly on the client side which rewrites the call stack, the code should wrap the exception in another Exception.
Alternatively an Aggregate Exception can also be thrown with the actual exception as its inner exception. Since user code awaits on tasks, throwing AggregateExceptions will not be right thing to do as await should not throw AggregateException and instead unwrap.

[amanbha]

The issue in dotnet which can help with setting stack trace correctly is closed without fixing: https://github.com/dotnet/corefx/issues/9294

Its suggested in the thread to throw a another custome exception with original exception from server as the inner exception.