SilverlightSerializer MissingMethodException on WP7

I wanted to start a list of common reasons why Silverlight Serializer throws the MissingMethodException exception. First off you need to make sure you've got a WP7 build of the Silverlight Serializer - you can get a copy from the WP7Contrib code base if you don't want to build your own.

Classes causing MissingMethodException exception:

System.Uri,
System.Globalization.CultureInfo

To correct the issue for the above classes you will have to implement a classes that acts a serialization proxy, the one shown below is for System.Uri.

[Serializer(typeof(Uri))]
public sealed class SerializeUri : ISerializeObject
{
    public object[] Serialize(object target)
    {
        return new object[] { ((Uri) target).ToString() };
    }

    public object Deserialize(object[] data)
    {
        return new Uri((string) data[0]);
    }
}

As said I'm going to try and keep this upto date as I come across framework classes not supported.