C#制作一个正方形代码~~~

for (int i = 0; i < 5; i++)
{
for (int j = 0; j < 10; j++)
{
Console.Write("*");
}
Console.WriteLine();
}
Console.Read();

不明白你这个正方形是干什么的~~~~

Rectangle rect = new Rectangle(left,top,width,height);

如果用于 显示
....OnPaint...
{
e.Graphics.DrawRectangle(SystemPens.ControlText,rect);
}