public void Append_WithTagHelperContent_MultipleAppends() { // Arrange var tagHelperContent = new DefaultTagHelperContent(); var copiedTagHelperContent = new DefaultTagHelperContent(); var text1 = "Hello"; var text2 = " World!"; var expected = text1 + text2; tagHelperContent.Append(text1); tagHelperContent.Append(text2); // Act copiedTagHelperContent.Append(tagHelperContent); // Assert Assert.Equal(expected, copiedTagHelperContent.GetContent()); Assert.Equal(new[] { text1, text2 }, copiedTagHelperContent.ToArray()); }