code block for genreating randon string from a fixed set of chars.

public string GenerateRandomString()
{
var charsToChooseFrom = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
      var length = 50;
      var random = new Random();
      var randomString = new string(
       Enumerable.Repeat(charsToChooseFrom, length)
                          .Select(t => t[random.Next(t.Length)])
                          .ToArray());

      return randomString;
}
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 Mritunjay Kumar
Works at Mindfire Solutions

I mostly work with C#, ASP.NET, MVC, WCF, Web API, Entity FrameWork, MS Sql.

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