You don’t need to worry much about these as you have already figured it out that I don’t effect your program directly.
These warning/exceptions are mostly related run-time, default directory structures etc and the way they are defined we can’t do much about them.
Let’s say for the exception Culture not supported
see this for explanation of why it happens
Moreover if you use some third party plugin like Resharper
etc. you’ll get a lot of Code errors and suggestions and some related to assemblies this may bother your for some time that your code has so many glitches but again you don’t have much control over them and leaving them as it is doesn’t affect the main program anyhow.