asp.net produces random color implementation code _ Practical skills

Copy Code code as follows:

public string Getrandomcolor ()
{
Random Randomnum_first = new Random ((int) DateTime.Now.Ticks);
There's nothing to say about random numbers in C #
System.Threading.Thread.Sleep (Randomnum_first.next (50));
Random Randomnum_sencond = new Random ((int) DateTime.Now.Ticks);

In order to be displayed on a white background, try to produce dark
int int_red = Randomnum_first.next (256);
int int_green = Randomnum_sencond.next (256);
int int_blue = (int_red + int_green > 400)? 0:400-int_red-int_green;
Int_blue = (Int_blue > 255)? 255:int_blue;

Return Color.FromArgb (int_red, Int_green, Int_blue). Name;
}