合并两个IEnumerable <T>

using System;
using System.Collections.Generic;
using System.Linq;

class Program
{
    static void Main()
    {
        List<int> list1 = new List<int> { 1, 2, 3, 4, 5 };
        List<int> list2 = new List<int> { 6, 7, 8, 9, 10 };

        IEnumerable<int> mergedList = MergeIEnumerable(list1, list2);

        foreach (int item in mergedList)
        {
            Console.WriteLine(item);
        }
    }

    static IEnumerable<T> MergeIEnumerable<T>(IEnumerable<T> list1, IEnumerable<T> list2)
    {
        return list1.Concat(list2);
    }
}