How to generate a string randomly using C#?

Firstly, set a string.

StringBuilder str = new StringBuilder();

Use Random.

Random random = new Random((int)DateTime.Now.Ticks);

Now loop through a number which is the length of the random string you want.

for (int i = 0; i < 4; i++) {    c = Convert.ToChar(Convert.ToInt32(Math.Floor(26 * random.NextDouble() + 65)));    str.Append(c); }

On every iteration above, a random character is generated and appended to form a string.

The following is the complete example −

Example

 Live Demo

using System.Text; using System; class Program {    static void Main() {       StringBuilder str = new StringBuilder();       char c;       Random random = new Random((int)DateTime.Now.Ticks);       for (int i = 0; i < 4; i++) {          c = Convert.ToChar(Convert.ToInt32(Math.Floor(26 * random.NextDouble() + 65)));          str.Append(c);       }       Console.WriteLine(str.ToString());    } }

Output

ATTS