web api saving files to temporary folder but visual studio wants to compile them

We have an MVC web API in which some typescript code keeps getting placed here:

C:...\WebAPI\obj\Test\Package\PackageTmp\scripts\bowtie\bowtie.d.ts

I don't midn code being copied to a temporary folder, but Visual Studio tries to compile the code there and runs into issues. I have to go to that folder, delete the files, and the compile again.

Why do files get copied to that directory? Can I tell Visual Studio not to compile those files? Can I tell it not to copy those files to that location?