Nice, I do like the expression trees. :)
Unfortunately, I can't remember the reference I used to make this one, but I find the property name in a slightly different way:
public static string PropertyName<T>(Expression<Func<T, object>> expression)
var body = expression.Body as MemberExpression;
if (body == null)
body = ((UnaryExpression)expression.Body).Operand as MemberExpression;
Then, I can just use the following to get the property name:
The benefit here is that you don't have to instantiate a new object to get the property name.