Writing File to Temp Folder

Question

I want to use StreamWriter to write a file to the temp folder.

It might be a different path on each PC, so I tried using %temp%\SaveFile.txt but it didn't work.

How can I save to the temp folder, using environmental variables?

And for example, can I use an environmental variable for storing files in %appdata%?

Answer 1

string result = Path.GetTempPath(); 

https://docs.microsoft.com/en-us/dotnet/api/system.io.path.gettemppath

Answer 2

The Path class is very useful here.
You get two methods called

Path.GetTempFileName

Path.GetTempPath

that could solve your issue

So for example you could write: (if you don't mind the exact file name)

using(StreamWriter sw = new StreamWriter(Path.GetTempFileName())) {     sw.WriteLine("Your error message"); } 

Or if you need to set your file name

string myTempFile = Path.Combine(Path.GetTempPath(), "SaveFile.txt"); using(StreamWriter sw = new StreamWriter(myTempFile)) {      sw.WriteLine("Your error message"); }