Add property to anonymous type after creation

Question

I use an anonymous object to pass my Html Attributes to some helper methods. If the consumer didn't add an ID attribute, I want to add it in my helper method.

How can I add an attribute to this anonymous object?

Answer 1

The following extension class would get you what you need.

public static class ObjectExtensions {     public static IDictionary<string, object> AddProperty(this object obj, string name, object value)     {         var dictionary = obj.ToDictionary();         dictionary.Add(name, value);         return dictionary;     }      // helper     public static IDictionary<string, object> ToDictionary(this object obj)     {         IDictionary<string, object> result = new Dictionary<string, object>();         PropertyDescriptorCollection properties = TypeDescriptor.GetProperties(obj);         foreach (PropertyDescriptor property in properties){             result.Add(property.Name, property.GetValue(obj));         }         return result;     } }