I Need A Library For Microsoft.SqlServer.Dts.Tasks.ScriptTask;

I need a library for Microsoft.SqlServer.Dts.Tasks.ScriptTask. How do I go about getting this.



Basically I am trying to execute the following code to verify my SSIS ran correctly.



using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.SqlServer.Dts.Runtime;
using Microsoft.SqlServer.Dts.Tasks.ScriptTask;

namespace Package_API
{
class Program
{
static void Main(string[] args)
{
Package p = new Package();
p.InteractiveMode = true;
p.OfflineMode = true;

// Add a Script Task to the package.
TaskHost taskH = (TaskHost)p.Executables.Add("STOCK : ScriptTask");
// Run the package.
p.Execute();
// Review the results of the run.
if (taskH.ExecutionResult == DTSExecResult.Failure || taskH.ExecutionStatus == DTSExecStatus.Abend)
Console.WriteLine("Task failed or abended");
else
Console.WriteLine("Task ran successfully");
}
}
}