Generate Random Number And Random String In C#

C# Random class provides functionality to generate random numbers in C#. The Random class constructors have two overloaded forms. It takes either no value or it takes a seed value


public static string GetRandomString(int length,bool includeAlphabet =true, bool includeNumbers = true,
bool includespecialChar = false,bool capsOnly=false)
        {
            Random ran = new Random();

            String b = "";
            if (includeAlphabet)
                b += "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
            if (includeNumbers)
                b += "1234567890";
            if(includespecialChar)
                b+="!@#$%^&*()_";

            String random = "";

            for (int i = 0; i < length; i++)
            {
                int a = ran.Next(b.Length);
                random = random + b.ElementAt(a);
            }

            return (capsOnly?random.ToUpper(): random);
        }