internal static Type VerifyConcreteClass(Type sourceType, Type resultType)
{
if (resultType == null)
{
return(null);
}
var result = resultType.GetTypeInfo();
if (result != null && (result.IsAbstract || result.IsInterface || !sourceType.GetTypeInfo().IsAssignableFrom(result)))
{
throw RuntimeFailure.ConcreteClassError(resultType);
}
return(resultType);
}