AnonymousTypeHelper.cs

public static class AnonymousTypeHelper
{
    public static T Cast<T>(T typeHolder, object x)
    {
        return (T)x;
    }

    public static T GetNull<T>(T typeHolder) where T : class
    {
        return null;
    }

    public static Dictionary<TKey, TValue> CreateDictionary<TKey, TValue>(TKey keyTypeHolder, TValue valueTypeHolder)
    {
        return new Dictionary<TKey, TValue>();
    }

    public static List<TValue> CreateList<TValue>(TValue valueTypeHolder)
    {
        return new List<TValue>();
    }

    public static IQueryable<TValue> GetNullIQueryable<TValue>(TValue valueTypeHolder)
    {
        return (IQueryable<TValue>)null;
    }
}