Try this
DataSet ds = new DataSet("TimeRanges");
using(SqlConnection conn = new SqlConnection("ConnectionString"))
{
SqlCommand sqlComm = new SqlCommand("Procedure1", conn);
sqlComm.Parameters.AddWithValue("@Start", StartTime);
sqlComm.Parameters.AddWithValue("@Finish", FinishTime);
sqlComm.Parameters.AddWithValue("@TimeRange", TimeRange);
sqlComm.CommandType = CommandType.StoredProcedure;
SqlDataAdapter da = new SqlDataAdapter();
da.SelectCommand = sqlComm;
da.Fill(ds);
}