格式文本框如何突出文本块无选择
我需要在RTB文本的某一部分要在改变的字体样式/彩色的感不突出，但在制造一个块选择与特定颜色的感觉。这类似于Visual Studio中如何突出期间调试模式的线。
I need a certain portion of my text in RTB to be highlighted not in the sense of changing the font style/color, but in the sense of making a block selection with a particular color. This is similar to how Visual Studio highlights a line during debug mode.
这里最重要的是要实现提到的功能的无使用richtextbox.select功能，因为在RichTextBox我正在定期更新，如果它调用了select函数每次更新时，用户会有困难的时候拖动文字，我不希望这样的事情发生。
The important thing here is to achieve the mentioned feature WITHOUT using richtextbox.select function, because the richtextbox I have is being periodically updated and if it calls the select function on each update, the user will have a difficult time dragging the text and I don't want that to happen.
我听说某处一个解决方案，并编辑RTF的线，但我不能完全肯定如何做到这一点。我想AP preciate给予任何帮助。
I've heard a solution somewhere along the line of editing the rtf but I'm not entirely certain how to do this. I'd appreciate any help given.
编辑：刚刚意识到问题是的WinForms。以下的答案必须为WPF，而不是删除我要离开它，万一有人发现它有用。
Just realized question is for winforms. The following answer is for WPF, rather than delete I'm gonna leave it, in case someone find it useful.
获取使用的TextRange（...）文本和应用背景 例如：
Get the text using TextRange(...) and apply Background for example:
TextRange tr = new TextRange(position, nextPosition);
var Br = new SolidColorBrush(Color.FromScRgb(alpha, 1f, 1f, 0f));
tr.ApplyPropertyValue(TextElement.BackgroundProperty, Br);
但是，也许你应该考虑你的更新机制，并拿出一个更好的解决方案。
But perhaps you should look into your update mechanism and come up with a better solution.