Most of the time that I’m creating integration packages, I have a central working directory where all the action is taking place, at the end of the package execution is where I’ll archive files so that should they be needed to troubleshoot an issue I’ve got them in a handy place.  This is a script that I created for that process.  Note that lines 7 through 19 are generated by the Visual Studio Tools for Applications in SSIS when you create the script task.

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

namespace ST_218640c1eafd4eb9ab909245d34e01c7.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()
{
string strOriginalFileName = @"C:\TCC\20110722-UpdateCandidate\UpdateHireEmpStatus.csv";
string strArchivedFileName;
string strDate;
DateTime dtDate = DateTime.Now;

strDate = String.Format("{0:yyyyMMdd_HH_mm_ss}", dtDate);

strArchivedFileName = @"C:\TCC\20110722-UpdateCandidate\Archive\UpdateHireEmpStatus-" + strDate + ".csv";

File.Move(strOriginalFileName, strArchivedFileName);
Dts.TaskResult = (int)ScriptResults.Success;
}
}
}