C# 中的关键字实现
有没有办法，以及如何实现我自己的关键字，例如 in 和 as （等），以在我的代码中使用？
这就是我的想法。我想（我想只是出于我个人的原因）添加一些我自己的关键字，其中之一是“was”关键字：
if(Control was Clicked)
{
// etc etc
}
Is there a way, and how would I go about implementing my own keyword such as in, and as (etc), to be used in my code?
Here is what I had in mind. I want to (just for my own personal reasons, I guess) add a few keywords of my own, one of which would be the "was" keyword:
if(Control was Clicked)
{
// etc etc
}
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不。
你能得到的最接近的是扩展方法：
No.
The closest you could get would be an extension method:
不，您无法添加到 C# 语言，除非编写您自己的编译器。
但是，您的“was”关键字让我认为您可能正在寻找一种以声明方式处理事件的方法。 Microsoft 有一个名为“Reactive Extensions for .NET”的库（Rx ）这是 LINQ 的扩展，允许您以声明方式处理事件。
No, you can't add to the C# language, short of writing your own compiler.
However, your "was" keyword makes me think you might be looking for a way to declaratively handle events. Microsoft have a library called "Reactive Extensions for .NET" (Rx) that is an extension to LINQ that allows you to deal with events in a declarative fashion.
不，您不能向 C# 添加关键字 - 至少在不自己编写编译器的情况下不能。但是，如果您想要做的事情很简单，也许您可以使用自定义预处理器来完成。不过，您可能会失去 Visual Studio 中的一些语法突出显示和错误检查功能。
CLR 的一种语言被设计为可扩展，是 Boo。
No, you cannot add keywords to C# - at least not without writing a compiler for yourself. If what you want to do is simple, however, perhaps you could do it using a custom preprocessor. You would lose some syntax highlighting and error checking in Visual Studio, though.
One language for the CLR, that is designed to be extensible like that, is Boo.