c#数组间赋值与数组元素置零——初始化为默认值

 string[] aa_tt = new string[20];
            string[] aa_tt2 = new string[20];
            Array.Clear(aa_tt,0,aa_tt.Length); //数组每个元素置零
            Array.Copy(aa_tt,aa_tt2,aa_tt.Length);//数组数据拷贝