Is DS Out Of Scope Or Am I Free To Access From A Method?

Question

This is my syntax, I want to know if I can access DS from my _SelectedItemIndexChange in a different method in my partial ABCD class?

 [code]

 

namespace Test.Pages

{

public partial class ABCD : Pages

{

public Dataset DS = new DataSet()

public MainClass classE = new MainClass();

protected void itemPick_SelectedIndexChanged(object sender, EventArgs e)

{

DS = classE.PullSQLData();

}

}

}

public class MainClass

{

private DataSet DS = new DataSet();

private StringBuilder SB = new StringBuilder();

public DataSet PullSQLData()

{

string databaseConnection = "";

DS = new DataSet();

SqlQueryBuilder = new StringBuilder();

SqlQueryBuilder.Append("exec dbo.GetSQLData ");

DS = ExecuteSqlQuery(databaseConnection, SqlQueryBuilder.ToString());

return DS;

}

}

[/code]