More descriptive InvalidOperationException message in MetaBodyWriter class

[mpolacek1]

Issue description

Hello,
yesterday I encountered an exception with a really ambiguous message of what went wrong.
The InvalidOperationException was thrown in MetaBodyWriter class on line 134.

It's in this method:
private static string GetMessageContractBodyName(Type type)
{
if (!TryGetMessageContractBodyMemberInfo(type, out var memberInfo))
{
throw new InvalidOperationException(nameof(type));
}

return memberInfo.Name;
}

The exception thrown with omitted stack trace looked like this:
Unhandled exception. System.InvalidOperationException: type

Proposed solution

I would like to propose using type.ToString() instead of nameof(type) as the InvalidOperationException message.
So the exception message would look something like this:
System.InvalidOperationException: The.Types.Namespace.TypeClass

Or even better, add a descriptive message of what is wrong with the type argument and add it's type.ToString() to the new message.

Other remarks

The same problem is present in the same class in an another method called GetMessageContractBodyType at line 120

I could fix this myself, but if you want more descriptive messages I would need examples.

I apologize but English is not my main language. If anything I wrote is not clear I would be more than happy to clarify.

Thanks!

[mpolacek1]

I ended up creating this PR #1059

[mpolacek1]

PR #1059 was merged so I am closing this issue.