跨语言调用C#代码的新方式-DllExport

在以前，如果有其他语言需要调用C#编写的库，那基本上只有通过各种RPC的方式（HTTP、GRPC）或者引入一层C++代理层的方式来调用。

自从微软开始积极开发和研究Native AOT以后，我们有了新的方式。那就是直接使用Native AOT函数导出的方式，其它语言（C++、Go、Java各种支持调用导出函数的语言）就可以直接调用C#导出的函数来使用C#库。

废话不多说，让我们开始尝试。开始尝试

我们先来一个简单的尝试，就是使用C#编写一个用于对两个整数求和的Add方法，然后使用C语言调用它。

1.首先我们需要创建一个新的类库项目。这个大家都会了，可以直接使用命令行新建，也可以通过VS等IDE工具新建。https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com/a/hot/76273...https://weibo.com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