C# List全包含另一个List

C# List全包含另一个List

 	class Program
    {       
        static void Main(string[] args)
        {
     		#region 全部包含
            List<int> list1 = new List<int>();
            list1.Add(1);
            list1.Add(2);
            list1.Add(2);
            list1.Add(2);
            List<int> list2 = new List<int>();
            list2.Add(3);
            list2.Add(2);
            list2.Add(2);
            list2.Add(1);
       
            Console.Write("list1: ");
            for (int i = 0; i < list1.Count; i++)
            {
                Console.Write(list1[i] + " ");
            }
            Console.WriteLine();
            Console.Write("list2: ");
            for (int i = 0; i < list2.Count; i++)
            {
                Console.Write(list2[i] + " ");
            }

            Console.WriteLine();
            Console.WriteLine();
            Console.WriteLine("list1包含list2: " + list2.All(t => list1.Any(b => b == t)));
            Console.WriteLine("list2包含list1: " + list1.All(t => list2.Any(b => b == t)));

            Console.WriteLine("list1包含list2: " + ContainsAll(list1, list2));
            Console.WriteLine("list2包含list1: " + ContainsAll(list2, list1));

            Console.WriteLine("list1真包含list2: " + ContainsAll_Really(list1, list2));
            Console.WriteLine("list2真包含list1: " + ContainsAll_Really(list2, list1));

            Console.WriteLine();
            //全部移除
            list2.RemoveAll(li => list1.Contains(li));

            Console.Write("list1: ");
            for (int i = 0; i < list1.Count; i++)
            {
                Console.Write(list1[i] + " ");
            }
            Console.WriteLine();
            Console.Write("list2: ");
            for (int i = 0; i < list2.Count; i++)
            {
                Console.Write(list2[i] + " ");
            }
            #endregion;

            Console.ReadKey();
        }

		/// <summary>
        /// List_A 全包含 List_B
        /// [1,2,3] --> [1,2,2] = true
        /// [1,2,2,3] --> [1,2,2] = true
        /// </summary>
        /// <param name="list_A">列表A</param>
        /// <param name="list_B">列表B</param>
        static bool ContainsAll(List<int> list_A, List<int> list_B)
        {
            for (int i = 0; i < list_B.Count; i++)
            {
                if (!list_A.Contains(list_B[i]))
                    return false;
            }
            return true;
        }

        /// <summary>
        /// List_A 真全包含 List_B
        /// [1,2,3] --> [1,2,2] = false
        /// [1,2,2,3] --> [1,2,2] = true
        /// </summary>
        /// <param name="list_A">列表A</param>
        /// <param name="list_B">列表B</param>
        /// <returns></returns>
        static bool ContainsAll_Really(List<int> list_A, List<int> list_B)
        {
            List<int> list_1 = new List<int>(list_A);

            for (int i = 0; i < list_B.Count; i++)
            {
                if (!list_1.Contains(list_B[i]))
                    return false;
                else
                    list_1.Remove(list_B[i]);
            }
            return true;
        }
   }