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Hi,

Can anyone tell me how to generate random numbers so that on every execution it should not generate identical numbers or same numbers.
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Random numbers are started from a seed value: normally the system clock. So it shouldn't matter what you do as long as you don't start the random number generator at the same time!

In C#, it's pretty easy: a class level (possibly even static) instance of the Random class:
C#
private Random rand = new Random();

Then use it to generate your numbers when you want:
C#
for (int i = 0; i < 100; i++)
   {
   int r = rand.Next();
   Console.WriteLine(r);
   }
Should prove the sequence is different for each execution of your code.

If you want a single unique number for each execution, then Id suggest using a Guid instead:
C#
Guid id = Guid.NewGuid();
as these are very, very unlikely to be duplicated.
 
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Just use the Random class in .NET
make sure you use a different "seed" on each session.

http://msdn.microsoft.com/en-us/library/ctssatww(v=vs.110).aspx[^]

using the same "seed" will cause the Random generator class to create the same sequence again.
 
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