how to export function in dll to aot?

Question

I created .net class library to build dll and want to publish native aot

and I write function

public static MyClass
{
public static int MyFun(int n)
{
return n*n;
}
}

I publish it to native aot to win-x64 but in dll there is no function why?

Answer 1

Native aot libraries only support entry points with the [UnmanagedCallersOnly()] attribute.

https://learn.microsoft.com/en-us/dotnet/core/deploying/native-aot/?tabs=net8plus%2Cwindows#limitations-in-the-net-native-aot-deployment-model

try:

public static MyClass
{
     [UnmanagedCallersOnly(EntryPoint = "MyClass_MyFun")]
     public static int MyFun(int n)
     {
          return n*n;
     }
}