System.Linq.CachedReflectionInfo.Sum_NullableDouble_TSource_2 C# (CSharp) 메소드

        public static MethodInfo Sum_NullableDouble_TSource_2(Type TSource) =>
             (s_Sum_NullableDouble_TSource_2 ??
             (s_Sum_NullableDouble_TSource_2 = new Func<IQueryable<object>, Expression<Func<object, double?>>, double?>(Queryable.Sum).GetMethodInfo().GetGenericMethodDefinition()))
              .MakeGenericMethod(TSource);