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using (SqlConnection con = new SqlConnection())
{
con.ConnectionString = connectionString;
SqlDataAdapter sda = new SqlDataAdapter(sql, con);
DataSet ds = new DataSet();
try
{
sda.Fill(ds, "data");
}
catch
{
sda.Dispose();
con.Close();
con.Dispose();
}
return ds;
}
if(con.State! =ConnectionState.Open) con.Open();