您可以编辑csproj来定义要使用的类(在PropertyGroup内):

You can edit your csproj to define which class to use (inside a PropertyGroup):

<StartupObject>foo.Program2</StartupObject>

或通过以下命令在命令行上指定此MSBuild属性:

or specify this MSBuild property on the command line via:

$ dotnet build foo.csproj /p:StartupObject=foo.Program2