Check out example codes for "how to generate random numbers in c#". It will help you in understanding the concepts better.

Code Example 1

Random rnd = new Random();
int month  = rnd.Next(1, 13);  // creates a number between 1 and 12
int dice   = rnd.Next(1, 7);   // creates a number between 1 and 6
int card   = rnd.Next(52);     // creates a number between 0 and 51

Code Example 2

Random r = new Random();
int rInt = r.Next(0, 100); //for ints
int range = 100;
double rDouble = r.NextDouble()* range; //for doubles

Code Example 3

//The following code returns a random number. 
int num = random.Next();
//The following code returns a random number less than 1000.
int num = random.Next(1000);

Code Example 4

//works in visual studio for unity
int randomNumber = UnityEngine.Random.Range(1, 100);  //Random number between 1 and 99

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