SSIS: Alterar e retornar variaveis

/* Exemplo sobre como ler, alterar e retornar variáveis usando o componente Script Task num SSIS */


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

namespace ST_c82cf79963ff44c7bae239e77704543a.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


        // USER CODE
        // global vars: ssis_variable; String or Object
        // box: readWriteVariable: User::ssis_variable
        public void Main() {
            // set global ssis variable: ssis_variable
            Dts.Variables["User::ssis_variable"].Value = "hello world";

            // get global ssis variable: ssis_variable
            string the_aux_var = Dts.Variables["User::ssis_variable"].Value.ToString();

            // message box to "see" the result
            MessageBox.Show(the_aux_var);

            // TODO: Add your code here
            Dts.TaskResult = (int)ScriptResults.Success;
        }
    }
}