C# 產生4個0~15的亂數整數，並將4個亂數轉換成一組字串

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Random R = new Random();//亂A數A種O子l

this.txt_InterfereCode.Text=“”;

for (int i = 0; i < 4; i++)

{

int j = R.Next(0, 16);//0~15

this.txt_InterfereCode.Text += Convert.ToString(j, 16);

}