c# - Problems in generating random colors -

i want generate random colors in wpf , store them in array.

random r; color[] colarr = new color[6]; (int = 0; < colarr.length; i++) {    color c=new color();    r=new random();    r.next();    c.r = (byte)r.next(1, 255);    c.g = (byte)r.next(1, 255);    c.b = (byte)r.next(1, 255);    c.a = (byte)r.next(1, 255);    c.b = (byte)r.next(1, 255);              colarr[i] = c; } 

but elements of array represent 1 single color. when debugged code, found random colors every element, when code executed(not in debug mode) same color generated. makes clear code correct, there problem while execution.

edit :

how can increase randomness of colors generated?

the problem making new instance of random each run. should set once.

the default seed random system time, same if repeat fast loop; time won't change lot. if set @ start, random work expected.

i suggest use r.next(0, 256), since give value ranging 0 255.

also, call r.next() after definition of color c unnecessary, since don't use value.

random r = new random(); color[] colarr = new color[6]; (int = 0; < colarr.length; i++) {    color c=new color();    c.r = (byte)r.next(0, 256);    c.g = (byte)r.next(0, 256);    c.b = (byte)r.next(0, 256);    c.a = (byte)r.next(0, 256);    //c.b = (byte)r.next(1, 255);  line isn't needed btw            colarr[i] = c; }