private static Type CoalesceType <T>(T expctd, T actual)
{
if (typeof(T) != typeof(object))
{
return(typeof(T));
}
if (expctd == null && actual == null)
{
Throw.BadArg("Expected and Actual", "should not be both null");
}
return(((dynamic)expctd ?? (dynamic)actual).GetType());
//var sampl = (expctd == null) ? actual : expctd;
//return sampl.GetType();
}