Make ContractNameServices+methods public

[znakeeye]

Often when writing workarounds for shortcomings in a library, it is preferable to avoid reflection and re-writing string functions. In vs-mef one of the internal classes is often involved for keys in e.g. hash tables:

internal static class ContractNameServices // internal :(
{
    // ...
    internal static string GetTypeIdentity(Type type, bool formatGenericName) // internal :(
    // a.s.o.
}

I believe it would be helpful if this class and its methods were public.

[AArnott]

What is the situation where you need this, but aren't in a PartDiscovery-derived class that can reach this member via the PartDiscovery.GetContractName protected member?