ASP.NET

<system.webServer>
       <validation validateIntegratedModeConfiguration="false" />
<modules runAllManagedModulesForAllRequests="true">
     <remove name="ScriptModule" />
     <add name="ScriptModule" preCondition="managedHandler" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
   </modules>
       <handlers>
         <remove name="ExtensionlessUrlHandler-Integrated-4.0" />
         <remove name="OPTIONSVerbHandler" />
         <remove name="TRACEVerbHandler" />
         <add name="ExtensionlessUrlHandler-Integrated-4.0" path="*." verb="*" type="System.Web.Handlers.TransferRequestHandler" preCondition="integratedMode,runtimeVersionv4.0" />
       </handlers>
     </system.webServer>

public HttpResponseMessage GetName(string name)
       {
          User layer = new User();

           var result = layer.GetData(name);

           if (result.username != null)
           {
               var mes = string.Format("unsuccessful");
               return Request.CreateErrorResponse(HttpStatusCode.NotFound, mes);
           }
           else
           {
               return Request.CreateResponse(HttpStatusCode.OK, result);
           }

       }

Public Function EncryptAES(sIn As String, sKey As String) As String
     Dim AES As New RijndaelManaged()
     Dim ahashMD5 As New MD5CryptoServiceProvider()
     AES.Key = ahashMD5.ComputeHash(System.Text.ASCIIEncoding.ASCII.GetBytes(sKey))
     AES.Mode = CipherMode.OFB
     Dim AESEncrypt As ICryptoTransform = AES.CreateEncryptor()
     Dim aBuffer As Byte() = System.Text.ASCIIEncoding.ASCII.GetBytes(sIn)
     Return Convert.ToBase64String(AESEncrypt.TransformFinalBlock(aBuffer, 0, aBuffer.Length))
 End Function