public static byte[] encryptData(string data)
    {
        System.Security.Cryptography.MD5CryptoServiceProvider md5Hasher = new System.Security.Cryptography.MD5CryptoServiceProvider();
        byte[] hashedBytes;
        System.Text.UTF8Encoding encoder = new System.Text.UTF8Encoding();
        hashedBytes = md5Hasher.ComputeHash(encoder.GetBytes(data));
        return hashedBytes;
    }

Encryption of string

C#