c# - Random number generator with no duplicates -

basically i'm creating program randomly generate 6 unique lottery numbers there no duplicates in same line, here code have far...

        //generate 6 random numbers using randomiser object          int randomnumber1 = random.next(1, 49);         int randomnumber2 = random.next(1, 49);         int randomnumber3 = random.next(1, 49);         int randomnumber4 = random.next(1, 49);         int randomnumber5 = random.next(1, 49);         int randomnumber6 = random.next(1, 49);          textbox1.text = randomnumber1.tostring();         textbox2.text = randomnumber2.tostring();         textbox3.text = randomnumber3.tostring();         textbox4.text = randomnumber4.tostring();         textbox5.text = randomnumber5.tostring();         textbox6.text = randomnumber6.tostring();      } 

i'm getting random numbers there same number on same line, how make each number unique????

thanks in advance

you need store them in collection , each time pick new number need make sure it's not present already, otherwise need generate new number until find unique number.

instead of this, generate sequence between 1 , 49, shuffle them , pick 6 number out of sequence, example:

var rnd = new random(); var randomnumbers = enumerable.range(1,49).orderby(x => rnd.next()).take(6).tolist(); 

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