IDataReader - ToExpandoObjects

Enumerates to expando objects in this collection.

Try it

public static void Main()
{
	string sql = "SELECT 1 AS IntColumn, 'FizzBuzz' AS StringColumn UNION SELECT 2, 'BuzzBuzz'";
	
	using (var conn = new SqlConnection(FiddleHelper.GetConnectionStringSqlServer()))
    {
        conn.Open();
        using (DbCommand command = conn.CreateCommand())
        {
            command.CommandText = sql;
            using (IDataReader reader = command.ExecuteReader())
            {					
				//C# Extension Method: IDataReader - ToExpandoObjects
                List<dynamic> list = reader.ToExpandoObjects().ToList();
				
				Console.WriteLine(list[0].IntColumn);
                Console.WriteLine(list[0].StringColumn);
                Console.WriteLine(list[1].IntColumn);
                Console.WriteLine(list[1].StringColumn);
            }
        }
    }
}

View Source
using System.Collections.Generic;
using System.Data;
using System.Dynamic;
using System.Linq;

public static partial class Extensions
{
    /// <summary>
    ///     Enumerates to expando objects in this collection.
    /// </summary>
    /// <param name="this">The @this to act on.</param>
    /// <returns>@this as an IEnumerable&lt;dynamic&gt;</returns>
    public static IEnumerable<dynamic> ToExpandoObjects(this IDataReader @this)
    {
        Dictionary<int, KeyValuePair<int, string>> columnNames = Enumerable.Range(0, @this.FieldCount)
            .Select(x => new KeyValuePair<int, string>(x, @this.GetName(x)))
            .ToDictionary(pair => pair.Key);

        var list = new List<dynamic>();

        while (@this.Read())
        {
            dynamic entity = new ExpandoObject();
            var expandoDict = (IDictionary<string, object>) entity;

            Enumerable.Range(0, @this.FieldCount)
                .ToList()
                .ForEach(x => expandoDict.Add(columnNames[x].Value, @this[x]));

            list.Add(entity);
        }

        return list;
    }
}