How can I use collection initializer syntax with ExpandoObject?

Question

I\'ve noticed that the new ExpandoObject implements IDictionary which has the requisite IEnumerable

Answer 1

Using the idea from @samedave, and adding reflection, I got this:

void Main()
{
    dynamic foo = new ExpandoObject().Init(new
    {
        A = true,
        B = "Bar"
    });

    Console.WriteLine(foo.A);
    Console.WriteLine(foo.B);
}

public static class ExtensionMethods
{
    public static ExpandoObject Init(this ExpandoObject expando, dynamic obj)
    {
        var expandoDic = (IDictionary)expando;
        foreach (System.Reflection.PropertyInfo fi in obj.GetType().GetProperties())
        {
           expandoDic[fi.Name] = fi.GetValue(obj, null);
        }
        return expando;
    }
}

But it would be nicer to be able to just do it like:

dynamic foo = new ExpandoObject
{
    A = true,
    B = "Bar"
};

Please vote for this feature in Visual Studio UserVoice.

Update:

Using Rick Strahl's Expando implementation you should be able to do something like this:

dynamic baz = new Expando(new
{
    A = false,
    B = "Bar2"
});

Console.WriteLine(baz.A);
Console.WriteLine(baz.B);