C string encryption and decryption method instance

This article illustrates the C# string encryption and decryption method. Share to everybody for everybody reference. The details are as follows:

#region  Encryption to decrypt 

static string encryptKey= "Oyea";
#region  Encrypted string  public static string Encrypt(string str)
/// <summary>

///  Encrypted string 

/// </summary>

/// <param name="str"> The string to encrypt </param>

/// <returns> Returns the encrypted string </returns>

public static string Encrypt(string str) 

{   

    DESCryptoServiceProvider descsp = new DESCryptoServiceProvider();  // Instantiate the add / Decrypt class object   

    byte[] key = Encoding.Unicode.GetBytes(encryptKey); // Defines a byte array used to store keys    

    byte[] data = Encoding.Unicode.GetBytes(str);// Defines an array of bytes to store the string to be encrypted  

    MemoryStream MStream = new MemoryStream();// Instantiate a memory flow object      

    // Instantiate an encrypted stream object using a memory flow   

    CryptoStream CStream = new CryptoStream(MStream,descsp.CreateEncryptor(key, key), CryptoStreamMode.Write);     

    CStream.Write(data,0, data.Length);  // Writes data to an encrypted stream      

    CStream.FlushFinalBlock();             // Release encryption stream      

    return Convert.ToBase64String(MStream.ToArray());// Returns the encrypted string  

} 

#endregion
#region  Decrypt string    public static string Decrypt(string str)
/// <summary>

///  Decrypt string 

/// </summary>

/// <param name="str"> The string to decrypt </param>

/// <returns> Returns the decrypted string </returns>

public static string Decrypt(string str) 

{     

    DESCryptoServiceProvider descsp = new DESCryptoServiceProvider();  // Instantiate the add / Decrypt class object    

    byte[] key = Encoding.Unicode.GetBytes(encryptKey); // Defines a byte array used to store keys    

    byte[] data = Convert.FromBase64String(str);// Defines an array of bytes to store the string to be decrypted  

    MemoryStream MStream = new MemoryStream();// Instantiate a memory flow object      

    // Use memory flow instances to resolve dense flow objects       

    CryptoStream CStream = new CryptoStream(MStream, descsp.CreateDecryptor(key, key), CryptoStreamMode.Write);   

    CStream.Write(data,0, data.Length);      // Writes data to the decryption stream     

    CStream.FlushFinalBlock();              // Release decryption stream      

    return Encoding.Unicode.GetString(MStream.ToArray());      // Returns the decrypted string  

} 

#endregion

#endregion

Hopefully this article has helped you with your C# programming.