how to get random numbers in c#

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

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

Random rnd = new Random();
int value = rnd.Next(min,max);
Console.Write(value);

// Creates a random number between 1 and 10
int randomNumber = new Random().Next(1, 11);