public void Given_UriBuilderAndPartWithBackslash_When_AddPartInvoked_Then_PartAddedToUriBuilder() { var uriBuilder = new UriBuilder("http://www.testapi.com/api"); var testPart = "/test"; var generatedUri = uriBuilder.AddPathPart(testPart).Uri; Assert.IsTrue(generatedUri.ToString().Contains(testPart)); }