public virtual void Intercept(IInvocation invocation)
{
if (invocation.Method.Name.Equals("get_Parent"))
{
IDirectory dir = invocation.InvocationTarget as IDirectory;
string current = dir.Path;
string parent = new DirectoryInfo(current).Parent.FullName;
if (parentDirectory == null)
{
parentDirectory = fileService.GetDirectory(parent);
}
invocation.ReturnValue = parentDirectory;
}
else
invocation.Proceed();
}