gistfile1.cs

		public delegate T MethodExecution<T>(IDataReader reader);
		public static List<T> LoadList<T>(IDataReader reader, MethodExecution<T> method)
		{
			return LoadList<T>(reader, true, method);
		}
		public static List<T> LoadList<T>(IDataReader reader, bool close_reader, MethodExecution<T> method)
		{
			List<T> list = new List<T>();
			try
			{
				while (reader.Read())
				{
					list.Add(method(reader));
				}
				return list;
			}
			finally
			{
				if (close_reader)
					reader.Close();
			}
		}

// to use
IDataReader reader = DbProvider.Instance().GetLanguages();
List<string> languages = DataHelper.LoadList<string>(reader, r => r["culture_code"] as string);