ASP.NET

string pageName = "UniqueName";
languageCode = 1;  // Maps to English in database // Global to page
TranslateControls(pageName, this.Controls);

private void TranslateControls(string pageName, ControlCollection controls)
{
   for (int i=0; i < controls.Count; i++)
   {
      Control ctrl = controls[i];
      if (ctrl.HasControls())
      {
         // logger.Trace("Control: {0} has {1} child controls.", ctrl.UniqueID, ctrl.Controls.Count);
         TranslateControls(pageName, ctrl.Controls);
      }
      else
      {
         if (ctrl.GetType() == typeof(System.Web.UI.WebControls.Literal))
         {
            // check name
            if (ctrl.UniqueID.StartsWith("ABCD"))
            {
               // Replace with database lookup
               Literal litTemp = (Literal)ctrl;
               Database db = new Database();
               string textTranslation = db.GetText(pageName, ctrl.UniqueID, languageCode);
               litTemp.Text = textTranslation;
            }
         }
      }
   }
}

public partial class Examples_EncryptionExample : System.Web.UI.Page<br />
{<br />
    CspParameters CspParam;<br />
    string publicXmlString = string.Empty;<br />
    string privateXmlString = string.Empty;<br />
    protected void Page_Load(object sender, EventArgs e)<br />
    {<br />
        try<br />
        {<br />
            byte []  encrypted;<br />
            string decrypted;<br />
<br />
            UnicodeEncoding ByteConverter = new UnicodeEncoding();<br />
            encrypted = EncrptData("data to encrypt");<br />
            Response.Write(System.Text.Encoding.Unicode.GetString(encrypted));<br />
            decrypted = DecryptData(encrypted);<br />
            Response.Write(decrypted);<br />
        }<br />
        catch (Exception ex)<br />
        {<br />
        }<br />
    }<br />
<br />
    public string DecryptData(byte [] data)<br />
    {<br />
        RSACryptoServiceProvider RsaCsp;<br />
        byte[] decryptedData;<br />
        RsaCsp = new RSACryptoServiceProvider();<br />
        RsaCsp.FromXmlString(privateXmlString);<br />
        decryptedData = RsaCsp.Decrypt(data, false);<br />
        return System.Text.Encoding.Unicode.GetString(decryptedData);<br />
    }<br />
<br />
    public byte [] EncrptData(string data)<br />
    {<br />
        RSACryptoServiceProvider RsaCsp;<br />
        RSACryptoServiceProvider RsaCsp2;<br />
        UnicodeEncoding ByteConverter = new UnicodeEncoding();<br />
        CspParam = new CspParameters();<br />
        CspParam.KeyContainerName = "CustomKeys";<br />
        CspParam.Flags = CspProviderFlags.UseMachineKeyStore;<br />
<br />
        byte[] encryptedData = ByteConverter.GetBytes(data);<br />
<br />
        RsaCsp = new RSACryptoServiceProvider(CspParam);<br />
<br />
        //Getting public key<br />
        publicXmlString = RsaCsp.ToXmlString(false);<br />
        //Getting private key<br />
        privateXmlString = RsaCsp.ToXmlString(true);<br />
<br />
        RsaCsp2 = new RSACryptoServiceProvider();<br />
        RsaCsp2.FromXmlString(publicXmlString);<br />
        encryptedData = RsaCsp2.Encrypt(System.Text.Encoding.Unicode.GetBytes(data), false);<br />
<br />
        return encryptedData;<br />
    }<br />
}

<br />
Exception Details: System.Security.Cryptography.CryptographicException: The system cannot find the file specified.<br />
<br />
<br />
Source Error: <br />
<br />
<br />
Line 35:         byte[] decryptedData;<br />
Line 36:         RsaCsp = new RSACryptoServiceProvider();<br />
Line 37:         RsaCsp.FromXmlString(privateXmlString);<br />
Line 38:         decryptedData = RsaCsp.Decrypt(data, false);<br />
Line 39:         return System.Text.Encoding.Unicode.GetString(decryptedData);<br />
 <br />
<br />
Source File: c:\Data\iis\www\DefaultWeb\Phoenix\Admin\Examples\EncryptionExample.aspx.cs    Line: 37 <br />
<br />
Stack Trace: <br />
<br />
<br />
[CryptographicException: The system cannot find the file specified.<br />
]<br />
   System.Security.Cryptography.CryptographicException.ThrowCryptogaphicException(Int32 hr) +33<br />
   System.Security.Cryptography.Utils._CreateCSP(CspParameters param, Boolean randomKeyContainer, SafeProvHandle& hProv) +0<br />
   System.Security.Cryptography.Utils.CreateProvHandle(CspParameters parameters, Boolean randomKeyContainer) +201<br />
   System.Security.Cryptography.RSACryptoServiceProvider.ImportParameters(RSAParameters parameters) +262<br />
   System.Security.Cryptography.RSA.FromXmlString(String xmlString) +465<br />
   Examples_EncryptionExample.DecryptData(Byte[] data) in c:\Data\iis\www\DefaultWeb\Phoenix\Admin\Examples\EncryptionExample.aspx.cs:37<br />
   Examples_EncryptionExample.Page_Load(Object sender, EventArgs e) in c:\Data\iis\www\DefaultWeb\Phoenix\Admin\Examples\EncryptionExample.aspx.cs:28<br />
   System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +15<br />
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +34<br />
   System.Web.UI.Control.OnLoad(EventArgs e) +99<br />
   System.Web.UI.Control.LoadRecursive() +47<br />
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1061