Passing arguments from VBscript to the executable file and getting value from exe without openning the command box for exe

Create test.vbs file and put the below lines in it

Set oArgs = WScript.Arguments
If oArgs.Length = 0 Then
 WScript.Echo "Please provide arguments"
Else
 For Each sArg In oArgs
  REM WScript.Echo "Hello " & sArg
  s = s & sArg & " "
 Next
 WScript.Echo encryptdecrypt(s)
End If
Function encryptdecrypt(str)
 Set objShell = WScript.CreateObject("WScript.Shell")
 Set objExec = objShell.Exec("E:\encryptdecrypt.exe" &  "  " & str)
 line = objExec.StdOut.ReadAll
 encryptdecrypt=line
End Function

Execute script file on command prompt as
c:\>cscript e:\test.vbs e amit
c:\>cscript e:\test.vbs d 82VoUK9EyZpXVuSlNHvVmA==
Exe file in C#

class Program
{
 static void Main(string[] args)
 {
     if (args.Length == 0)
     {
  Console.WriteLine("Please provide arguments.");
  return; //no command line arg.
     }
     if (args.Length == 2)
     {
  try
  {
      string key = "YourKeyHere";
      if (args[0].Trim().ToLower() == "e")
      {
   string decryptedstring = EncryptDecryptClass.Encrypt(args[1].Trim(), key);
   Console.WriteLine(decryptedstring);
      }
      if (args[0].Trim().ToLower() == "d")
      {
   string decryptedstring = EncryptDecryptClass.Decrypt(args[1].Trim(), key);
   Console.WriteLine(decryptedstring);
      }
  }
  catch (Exception e)
  {
      Console.WriteLine(e.Message);
  }
     }          
 }
}

Execute exe file on command prompt as
C:/>E:\encryptdecrypt e helloworld