C#删除数组元素

using System;

namespace ConsoleApp1
{
    class Program
    {
        /// <summary>
        /// 删除数组元素
        /// </summary>
        /// <param name="arrayBorn">源数组</param>
        /// <param name="index">索引</param>
        /// <param name="Len">删除长度</param>
        static string[] DeleteEle(string[] arrayBorn,int index,int Len) 
        {
            if (Len < 0)    //删除长度小于0，返回
            {
                return arrayBorn;
            }
            if ( (index + Len) > arrayBorn.Length)      //删除长度超出数组范围 
            {
                Len = arrayBorn.Length - index;         //将长度设置为能删除的最大长度
            }
            for (int i = 0;i < arrayBorn.Length - ( index + Len); i++)      //将删除元素后面的元素往前移动
            {
                if ((index + i + Len) > arrayBorn.Length)       //若删除元素+删除长度超过数组的范围，即无法从数组中找到移动元素，则用null替代
                {
                    arrayBorn[index + i] = null;
                }
                else            //若能用数组的元素替换则用数组中的元素
                {
                    arrayBorn[index + i] = arrayBorn[index + i + Len];
                }           
            }
            /*不改变数组长度*/
            for (int j =Len;j > 0; j--)         //将删除元素后多余的元素置为null值
            {
                arrayBorn[arrayBorn.Length - j ] = null;
            }
            return arrayBorn;            
            /*改变数组长度
            string[] newArray = new string[arrayBorn.Length-Len];
            for (int j =0;j < newArray.Length;j++) 
            {
                newArray[j] = arrayBorn[j];
            }
            return newArray;
            */
        }
        static void Main(string[] args)
        {
            string[] arrayString = new string[] { "0","1","2","3","4","5"};
            Console.WriteLine("原数组元素：");
            foreach (string i in arrayString)
            {
                Console.Write(i + " ");
            }
            Console.WriteLine();
            arrayString = DeleteEle(arrayString, 1, 3);
            Console.WriteLine("删除元素后的数组");
            foreach (String i in arrayString)
            {
                Console.Write(i + " ");
            }
        }
    }
}