C# - Using Embedded File In VS2008 Project?

I have an ASP.NET project and want to include an XML file inside the project to store some relatively static data. To do this I selected "Add File" from the solution context menu and picked my XML file. Having added this to my project, I then wanted to load the XML from within code. I tried the following:

XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load("MyData.xml");

I also tried:

XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load("~/MyData.xml");

But it seems to be looking in the current directory (i.e. my VS2008 directory) and not the project. Am I going about this wrongly? Is there a way to simply reference a resource that's embedded in the project like this?