I have just created a WPF application and just been wondering where is my app.config file?
I looked in the bin/Debug and bin/Release directories and there is just one file "WpfApplication1.vshost.exe" and could not find any app.config file.
All I can do is Add->New Configuratin File and this too, doesn't come in debug or Release folder.
Can anyone guide me whether I should manually copy and paste it in the debug or Release Folder?
So finally: the ANSWER
If app.config does not exist, then try creating a new one by "Add->New Item->Application Configuration File" and create a file named "App.config". After this, try rebuilding your application, the .config file specific to your project should appear in bin/Debug & bin/Release folder.
It should be getting copied into the Debug/Release folders automatically. However, you could try explicitly setting the "Copy to output directory" in the properties to Copy always and see if it appears.
After creating simple WPF project my solution look like this. App.config lies there, which is the configuration file itself
When you build your solution, which in my case is named as WpfApplication1, config file lies at WpfApplication1.exe.config in \WpfApplication1\bin\Debug\ folder.
When you build your application,it automatically gets copies to debug/Release Folder.just look for *.config file in those folders.
If you build your project you should have a file named foo.bar.exe.config in you binary directory. The app.config file itself should be visible within your solution directory.
来源：https://stackoverflow.com/questions/14194114/configuration-file-in-c-sharp-default-location