Apparently XamlWriter doesn't works correctly in a WinForms application.

XamlWriter uses MarkupWriter.GetMarkupObjectFor(object obj). I suppose that there's a problem to determine the full list of properties to serialize.

var ar = new AssemblyReference(AppDomain.CurrentDomain.GetAssemblies().First()); var str = XamlWriter.Save(ar);

Running an ASP.NET or WPF application I got this result:

<AssemblyReference AssemblyName="mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" 
HintPath="file:///c:/WINDOWS/Microsoft.NET/Framework/v2.0.50727/mscorlib.dll" 
SpecificVersion="False" xmlns="clr-namespace:Ivolutia.TypeModel;assembly=ivoTypeModel" />

But running the same code in a WinForms application I got this:

<AssemblyReference xmlns="clr-namespace:Ivolutia.TypeModel;assembly=ivoTypeModel" />

this is the class definition:

public class AssemblyReference : DependencyObject
{
    public string AssemblyName { get; set; }
    public string HintPath { get; set; }
    public bool SpecificVersion { get; set; }

    public AssemblyReference() { }

    public AssemblyReference(Assembly assembly)
    	{
    		AssemblyName = assembly.FullName;
    		HintPath = assembly.CodeBase;
    	}

    	public override string ToString()
    	{
    		return AssemblyName;
    	}
}