How to change .Net Core 2 debugger port of VSCode

If about web application then you should in folder .vscode in launch.json file find line:

"env": {
 "ASPNETCORE_ENVIRONMENT":"Development"
},

and add after "ASPNETCORE_ENVIRONMENT":"Development", that: "ASPNETCORE_URLS":"http://localhost:xxxx" where xxxx - port that you want to use.