C#刪除數組元素

using System;

namespace ConsoleApp1
{
    class Program
    {
        /// <summary>
        /// 刪除數組元素
        /// </summary>
        /// <param name="arrayBorn">源數組</param>
        /// <param name="index">索引</param>
        /// <param name="Len">刪除長度</param>
        static string[] DeleteEle(string[] arrayBorn,int index,int Len) 
        {
            if (Len < 0)    //刪除長度小於0，返回
            {
                return arrayBorn;
            }
            if ( (index + Len) > arrayBorn.Length)      //刪除長度超出數組范圍 
            {
                Len = arrayBorn.Length - index;         //將長度設置為能刪除的最大長度
            }
            for (int i = 0;i < arrayBorn.Length - ( index + Len); i++)      //將刪除元素后面的元素往前移動
            {
                if ((index + i + Len) > arrayBorn.Length)       //若刪除元素+刪除長度超過數組的范圍，即無法從數組中找到移動元素，則用null替代
                {
                    arrayBorn[index + i] = null;
                }
                else            //若能用數組的元素替換則用數組中的元素
                {
                    arrayBorn[index + i] = arrayBorn[index + i + Len];
                }           
            }
            /*不改變數組長度*/
            for (int j =Len;j > 0; j--)         //將刪除元素后多余的元素置為null值
            {
                arrayBorn[arrayBorn.Length - j ] = null;
            }
            return arrayBorn;            
            /*改變數組長度
            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("原數組元素：");
            foreach (string i in arrayString)
            {
                Console.Write(i + " ");
            }
            Console.WriteLine();
            arrayString = DeleteEle(arrayString, 1, 3);
            Console.WriteLine("刪除元素后的數組");
            foreach (String i in arrayString)
            {
                Console.Write(i + " ");
            }
        }
    }
}