c#數組間賦值與數組元素置零——初始化為默認值

 string[] aa_tt = new string[20];
            string[] aa_tt2 = new string[20];
            Array.Clear(aa_tt,0,aa_tt.Length); //數組每個元素置零
            Array.Copy(aa_tt,aa_tt2,aa_tt.Length);//數組數據拷貝