C generates random number instances

This article gives an example of how C# generates random numbers. Share to everybody for everybody reference. The details are as follows:

/// <summary>  

///  generate num Digit verification code    Used for short message verification function   

/// </summary>  

public static Random rand = new Random();  

public static string getCode(int num)  

{  

    string result = "";  

    string s = "uabcdefghijklmnopqrstuvwxyz0123456789";  

    for (int i = 0; i < num; i++)  

    {  

 int k = ((rand.Next(1, 36) + i * 6) % 36) + 1;  

 result = string.Format("{0}{1}", result, s[k]);  

    } return result;  

} 
Random r = new Random(); // create 1 Random number generator   

int v= r.Next(1, 101);  // get 1 a   Less than or equal to 1  And less than 101 Random number.   That is: 1-100 Between the values of (including 1 , and 100 ) 

Hopefully this article has helped you with your C# programming.