我可以推荐使用混淆器。

好吧，你不能完全保护你的产品不被破解，但你可以最大化/增强安全级别，让它有点难以被新手和中级破解者破解。

但请记住，没有什么是不可破解的，只有服务器端的软件受到了很好的保护，无法被破解。无论如何，为了增强应用程序中的安全级别，您可以执行一些简单的步骤来防止某些黑客“不是全部”破解您的应用程序。下面这些步骤会让你抓狂甚至绝望:

Obfuscate your source code, obviously this will make your source code look like a mess and unreadable. Trigger several random checking routines inside your application like every two hours, 24 hours, one day, week, etc. or maybe after every action the user take. Save your released application's MD5 checksum on your server and implement a routine that can check the current file MD5 checksum with the real one on you server side and make it randomly triggered. If the MD5 checksum has been changed that means this copy has been pirated. Now you can just block it or release an update to block it, etc. Try to make a routine that can check if some of your codes (functions, classes, or specific routines) are actually have been modified or altered or even removed. I call it (code integrity check). Use free unknown packers to pack your application. Or, if you have the money, go for commercial solutions such as Thamida or .NET Reactor. Those applications get updated regularly and once a cracker unpack your application, you can just get a new update from those companies and once you get the new update, you just pack your program and release a new update. Release updates regularly and force your customer to download the latest update. Finally make your application very cheap. Don't make it too expensive. Believe me, you will get more happy customers and crackers will just leave your application, because it isn't worth their time to crack a very cheap application.

这些只是防止新手和中级破解者破解应用程序的简单方法。如果您有更多保护应用程序的想法，请不要羞于实现它们。这只会让破解者的生活变得艰难，他们会感到沮丧，最终他们会离开你的应用程序，因为它不值得他们花费时间。

最后，你还需要考虑花时间编写一个好的、高质量的应用程序。不要把时间浪费在编写复杂的安全层上。如果一个优秀的破解者想要破解你的应用程序，无论你做什么，他/她都会做。

现在去实现一些玩具饼干…

我可以推荐使用混淆器。

只需编写一个好的应用程序和一个简单的保护系统。不管你选择什么保护，它都会被逆转……所以不要浪费太多时间/金钱。

Here's one idea: you could have a server hosted by your company that all instances of your software need to connect to. Simply having them connect and verify a registration key is not sufficient -- they'll just remove the check. In addition to the key check, you need to also have the server perform some vital task that the client can't perform itself, so it's impossible to remove. This of course would probably mean a lot of heavy processing on the part of your server, but it would make your software difficult to steal, and assuming you have a good key scheme (check ownership, etc), the keys will also be difficult to steal. This is probably more invasive than you want, since it will require your users to be connected to the internet to use your software.

根据微软博客中的以下问题:

https://blogs.msdn.microsoft.com/amb/2011/05/27/how-to-prevent-ildasm-from-disassembling-my-net-code/

如何防止ILDASM分解程序集?

. net有一个名为SuppressIldasmAttribute的属性，它可以防止分解代码。例如，考虑以下代码:

using System;
using System.Text;
using System.Runtime.CompilerServices;
[assembly: SuppressIldasmAttribute()]

namespace HelloWorld
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Hello world...");
        }
    }
}

如你所见，只有两个不同之处:

我们添加了System.Runtime.CompilerServices命名空间减速。 我们添加了[assembly: SuppressIldasmAttribute()]属性。

在Visual Studio中构建应用程序后，当我们尝试在ILDASM中打开生成的EXE文件时，现在我们得到以下消息: