public static IDictionary<string, object> ToDictionary(this object data)
{
	BindingFlags publicAttributes = BindingFlags.Public | BindingFlags.Instance;
	Dictionary<string, object> dictionary = new Dictionary<string, object>();

	foreach (PropertyInfo property in data.GetType().GetProperties(publicAttributes))
	{
		if (property.CanRead)
			dictionary.Add(property.Name, property.GetValue(data, null));
	}
	return dictionary;
}

Get IDictionary from anonymous type

C#