Device platform example

public enum DevicePlatform { Desktop, PCVR, AndroidVR, AndroidMobile };
// ^ This goes in your namespace. Not in your UdonSharpBehaviour class! ^

public DevicePlatform GetLocalPlayerPlatform()
{
    if (!Utilities.IsValid(Networking.LocalPlayer)) return DevicePlatform.Desktop;

    #if UNITY_ANDROID
    if (Networking.LocalPlayer.IsUserInVR()) return DevicePlatform.AndroidVR;
    else return DevicePlatform.AndroidMobile;
    #endif

    if (Networking.LocalPlayer.IsUserInVR()) return DevicePlatform.PCVR;
    else return DevicePlatform.Desktop;
}