DotNetCore Reference issue

[SurabhiSaklani]

I've given reference in project.json file.

"dependencies": {
"Microsoft.AspNetCore.TestHost": "1.0.0",
"dotnet-test-nunit": "3.4.0-beta-2",
"Microsoft.NETCore.App": {
"type": "platform",
"version": "1.0.1"
},
"Moq": "4.6.38-alpha",
"NUnit": "3.5.0",
"JobSchedulerService": { "target": "project" }
},

But in my cs file i can not access namespace , it is saying ,namespace could not be found.
Please give some solution.

[SurabhiSaklani]

When i am running project from command prompt , it is running successfully . but in visual studio it is throwing issue 'could not found reference for particular namespace'.

Please provide help.