RandomStringGenerator

RandomStringGenerator.cs

public static class RandomStringGenerator
{
    private static readonly char[] defaultCharacters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789".ToArray();

    public static string GenerateString(int length)
    {
        string text = "";
        for (int i = 0; i < length; i++)
        {
            RandomNumberGenerator rNGCryptoServiceProvider = RandomNumberGenerator.Create();
            byte[] array = new byte[1];
            do
            {
                rNGCryptoServiceProvider.GetNonZeroBytes(array);
            }
            while (array[0] > 248);
            text += defaultCharacters[(int)array[0] % defaultCharacters.Length];
        }
        return text;
    }

    public static string GenerateString(int length, char[] characters)
    {
        string text = "";
        for (int i = 0; i < length; i++)
        {
			RandomNumberGenerator rNGCryptoServiceProvider = RandomNumberGenerator.Create();

			byte[] array = new byte[1];
			do
			{
				rNGCryptoServiceProvider.GetNonZeroBytes(array);
            }
            while (array[0] > 248);
            text += characters[(int)array[0] % characters.Length];
        }
        return text;
    }
}