System.Linq.CachedReflectionInfo.Count_TSource_1 C# (CSharp) Метод

        public static MethodInfo Count_TSource_1(Type TSource) =>
             (s_Count_TSource_1 ??
             (s_Count_TSource_1 = new Func<IQueryable<object>, int>(Queryable.Count).GetMethodInfo().GetGenericMethodDefinition()))
              .MakeGenericMethod(TSource);