AppDomain.CurrentDomain.BaseDirectory

在winform中的OnPaint事件中，AppDomain.CurrentDomain.BaseDirectory得到的是下面这个路径

C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\Common7\IDE

Application.ExecutablePath得到的是C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\Common7\IDE\devenv.exe

file:///C:/Users/clu/AppData/Local/Microsoft/VisualStudio/15.0_74da2886/ProjectAssemblies/us6sa4js01/Accor.Windows.Forms.dll

https://stackoverflow.com/questions/837488/how-can-i-get-the-applications-path-in-a-net-console-application

System.Reflection.Assembly.GetExecutingAssembly().Location¹

Combine that with System.IO.Path.GetDirectoryName if all you want is the directory.

¹As per Mr.Mindor's comment:
System.Reflection.Assembly.GetExecutingAssembly().Location
returns where the executing assembly is currently located, which may or
may not be where the assembly is located when not executing. In the
case of shadow copying assemblies, you will get a path in a temp
directory. System.Reflection.Assembly.GetExecutingAssembly().CodeBase will return the 'permanent' path of the assembly.

https://stackoverflow.com/a/841320/3782855

AppDomain.CurrentDomain.BaseDirectory

Don't use this. The BaseDirectory can be set at runtime. It is not guaranteed to be correct (like the accepted answer is).

entryAssembly.GetSatelliteAssembly

System.IO.FileNotFoundException: Could not find file 'file:///C:/Users/clu/AppData/Local/Microsoft/VisualStudio/15.0_74da2886/ProjectAssemblies/dgz79z6i01/en-US/Accor.Windows.Forms.resources.DLL'.
File name: 'file:///C:/Users/clu/AppData/Local/Microsoft/VisualStudio/15.0_74da2886/ProjectAssemblies/dgz79z6i01/en-US/Accor.Windows.Forms.resources.DLL'