Dictionary<string, string> dic = new Dictionary<string, string>();
SqlCommand cmd = new SqlCommand();
SqlDataReader myReader = cmd.ExecuteReader();

if (myReader != null)
{
        while(myReader.Read())
        {
            for (int i = 0; i <= myReader.GetSchemaTable().Columns.Count; i++)
                   dic.Add(myReader.GetSchemaTable().Columns[i].ColumnName,myReader[i].ToString() );
        }
}