need help with vb Script for checking if file exists using script task in ssis

Hi i am writing a script task in ssis. I need assistance in writing the script task. i googled it as i am newbie to scripting, i need help. So here is the code i got. but the thing is I dont want to hard code the file name because there are four files that exists with different numbers on it with the timestamp on it for that particular day. Can I do that at the point of file location in this script without hardcoding the file. i check this code but its poping up a window. I don't want to see any pop window instead send an email to concerned using send mail task in ssis. Suggest me how can I go about it and how do i know if files doesnt exist. if doesn't exist send an email that says doesnt exist .. Please help me in writing

using System;
using System.Data;
using Microsoft.SqlServer.Dts.Runtime;
using System.Windows.Forms;
using System.IO; 

namespace ST_d4b3389a51734caa85bb7d3b9a843c90.csproj
{
  [System.AddIn.AddIn("ScriptMain", Version = "1.0", Publisher = "", Description = "")]
  public partial class ScriptMain : Microsoft.SqlServer.Dts.Tasks.ScriptTask.VSTARTScriptObjectModelBase
  {

    #region VSTA generated code
    enum ScriptResults
    {
      Success = Microsoft.SqlServer.Dts.Runtime.DTSExecResult.Success,
      Failure = Microsoft.SqlServer.Dts.Runtime.DTSExecResult.Failure
    };
    #endregion

    

    public void Main()
    {

      //USe your folder and file name here to check if exists

      if (File.Exists(@"D:\\YOURFILEFOLDER\\Test.txt"))       -- [b]I need to check if four files are added dynamically or using wild card like * to imply that four files exists...[/b]
      {
        Dts.Variables["FileExtFlag"].Value = 1;
        MessageBox.Show(Dts.Variables["FileExtFlag"].Value.ToString()); //comment out this line, just for testing the value of variable
      }
      else
      {
        Dts.Variables["FileExtFlag"].Value = 0;
        MessageBox.Show(Dts.Variables["FileExtFlag"].Value.ToString()); //comment out , just to check value
      }
      // TODO: Add your code here
      Dts.TaskResult = (int)ScriptResults.Success;
    }
  }
}

Select allOpen in new window