Generate Random String

GenerateRandomString.cs

public static string GenerateRandomString(int length = 32)
{
    if (length <= 0)
        throw new ArgumentException("provided length must be greater than 0");
    
    using (RNGCryptoServiceProvider cryptoProvider = new RNGCryptoServiceProvider())
    {
        var bytes = new byte[length];
        cryptoProvider.GetNonZeroBytes(bytes);
        
        var allowedChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890".ToCharArray();
        var allowedLength = allowedChars.Length;
        var buffer = new char[length];
        
        for (int ndx = 0; ndx < length; ndx++)
        {
            buffer[ndx] = allowedChars[bytes[ndx] % allowedLength];
        }
        return new string(buffer);
    }
}