I develop an Angular app based on ASP.NET Core and there is some settings in `launchSettings.json` in order to run the app with the given ports as shown below:

```
"profiles": {
  "IIS Express": {
      "commandName": "IISExpress",
      "launchBrowser": true,
      "environmentVariables": {
      "DOTNET_ENVIRONMENT": "Development"
    }
  },
  "EmployeeProject.WebUI": {
      "commandName": "Project",
      "launchBrowser": true,
      "applicationUrl": "http://localhost:6000;https://localhost:6001",
      "environmentVariables": {
      "DOTNET_ENVIRONMENT": "Development"
    }
  }
}

```

However, I heard that these settings is **ignored** when using **VS Code** and when running the frontend and backend at the same time using `dotnet watch run` the app starts by using random ports in every run. So, how can I make the app starts using the same ports (6000 or 6001) via `dotnet run` or `dotnet watch run` in VS Code?
['https://Stackoverflow.com/questions/64634372', 'https://Stackoverflow.com', 'https://Stackoverflow.com/users/836018/']
If you want to do this the VS Code way, as long as you use F5 (or the Run > "Start Debugging" command), it's as simple as changing the `launch.json` file from this:

```json
...
"env": {
    "ASPNETCORE_ENVIRONMENT": "Development"
},
...

```

to this:

```json
...
"env": {
    "ASPNETCORE_ENVIRONMENT": "Development",
    "ASPNETCORE_URLS": "http://localhost:5001"
},
...

```

Otherwise, if you use the IIS Express profile, edit your `launchSettings.json` file to specify the port:

```json
"iisSettings": {
  "iisExpress": {
    "applicationUrl": "http://localhost:6000",
  }
},
"profiles" : { ... }

```
Running from command line execute `Kastrel` server not `IIS`.
In that case probably configuration `appsettings.json` is use. You can put in this configuration section to control port:

```
    "Kestrel": {
        "Endpoints": {
            "HTTP": {
                "Url": "http://localhost:6000"
            }
        }
    },

```