Open launchSettings.json and add it to profiles .
"Watch": { "executablePath": "C:\\Program Files\\dotnet\\dotnet.exe", "commandLineArgs": "watch run", "launchBrowser": true, "launchUrl": "http://localhost:5000", "environmentVariables": { "ASPNETCORE_ENVIRONMENT": "Development" } }
Open the project.json file and add it to tools .
"Microsoft.DotNet.Watcher.Tools": "1.0.0-preview2-final"
After recovery, we can observe from Visual Studio.

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