public void RemoveReference_ReferenceBeingRemovedHasFileExtension_ReferenceRemovedFromProject()
        {
            CreateTestProject();
            ProjectHelper.AddReference(project, "nunit.framework");
            CreateProjectSystem(project);

            string fileName = @"d:\projects\packages\nunit\nunit.framework.dll";

            projectSystem.RemoveReference(fileName);

            ReferenceProjectItem referenceItem = ProjectHelper.GetReference(project, "nunit.framework");

            Assert.IsNull(referenceItem);
        }