WPF生成随机颜色问题..

privatevoidmakubex()
{
lb=newListBox();
for(inti=0;i<grid.ColumnDefinitions.Count;i++)
{
for(intj=0;j<grid.RowDefinitions.Count;j++)
{
Rectanglerect=newRectangle();
SolidColorBrushscb=newSolidColorBrush(GetRandomColor());
lb.Items.Add(scb.ToString());
grid.Children.Add(rect);
rect.SetValue(Grid.RowProperty,i);
rect.SetValue(Grid.ColumnProperty,j);
rect.Fill=scb;
}
}
ShowPop();
}

Randomrandom=newRandom();

publicColorGetRandomColor()
{
returnColor.FromRgb((byte)random.Next(0,255),(byte)random.Next(0,255),(byte)random.Next(0,255));
}