private Expression <Func <T1, TKey> > GetKeySelector <T1, TKey>()
{
var key = MapperConfig.GetKeyMetas <T1>().SingleOrDefault();
if (key != null && key.Member != null && typeof(TKey).IsAssignableFrom(key.Member.GetMemberType()))
{
return(ExpressionHelper.CreateGetterExpression <T1, TKey>(key.Member));// key.Member.GetMemberProperty<T1, TKey>();
}
return(null);
}