Before going further, I would highly recommend to read these articles first:

In this article, you will learn how to export Unity project to Visual Studio. Once your Hologram is complete, so project is ready to be exported to Visual Studio and then to your HoloLens.

Follow these steps to export Unity to Visual Studio.

Performance Setting

Select Edit tab >> Project Setting >> Quality


Select Fastest in Default drop down from QualitySettings.


Build Settings

Select File >> Build Settings


Select Windows Store in the Platform list

Set SDK to Universal 10

Set Build Type to D3D


Specify the export for Windows Holographic

From the Build Settings... window, open Player Settings...


Select the Settings for Windows Store tab

Expand the Other Settings group

In the Rendering section, check the Virtual Reality Supported checkbox to add a new Virtual Reality Devices list and confirm "Windows Holographic" is listed as a supported device.


Export the Visual Studio solution

Now your Unity project has all the settings applied to be properly exported as a Visual Studio solution for a HoloLens app.

Return to the Build Settings window.

Click Add Open Scenes to add the scene

Check Unity C# Projects

Click Build


Click New Folder and name the folder "App".

With the App folder selected, click the Select Folder button.


When Unity is done building, a Windows File Explorer window will appear.

Open the App folder in File Explorer.

Open the generated Visual Studio solution (TestHolograms.sln in this example)


Conclusion
In this article, you have learnt how to export Unity to Visual Studio. If you have any question and comments, then post a comment in C# Corner comments section.