Snippet of PLAYER_SWITCH translated to C# from https://gist.github.com/speedium666/a8b81fd6d9039fb8a191d8d0bb8c7388

Display.cs

public static async Task StartSwitch(Vector4 fromWh, Vector4 toWh, int model)
{
    try
    {
        var from = new Vector3(fromWh.X, fromWh.Y, fromWh.Z);
        var to = new Vector3(toWh.X, toWh.Y, toWh.Z);
        var playerPed = Game.PlayerPed;
        var switchModel = new Model(model);
        var switchType = GetIdealPlayerSwitchType(from.X, from.Y, from.Z, to.X, to.Y, to.Z);
        var switchFlag = 1024;

        if (switchType == 3)
        {
            switchType = 2;
            if (to.DistanceToSquared2D(from) < 40f)
            {
                return;
            }
        }

        while (!HasModelLoaded((uint)switchModel.Hash))
        {
            SetEntityLocallyInvisible(playerPed.Handle);
            RequestModel((uint)switchModel.Hash);
            await BaseScript.Delay(0);
        }

        var switchToPed = await World.CreatePed(switchModel, to, 0);
        switchToPed.IsVisible = false;
        switchToPed.IsInvincible = true;
        SetEntityAsMissionEntity(switchToPed.Handle, true, false);
        switchToPed.Task.ClearAllImmediately();

        if (!playerPed.IsInjured)
        {
            switchToPed.Heading = toWh.W;
        }

        switchToPed.IsCollisionEnabled = false;
        switchToPed.IsVisible = false;

        SetModelAsNoLongerNeeded((uint)switchModel.Hash);

        StartPlayerSwitch(playerPed.Handle, switchToPed.Handle, switchFlag, switchType);

        while (GetPlayerSwitchState() != 8)
        {
            SetEntityLocallyInvisible(playerPed.Handle);
            await BaseScript.Delay(0);
        }

        SetFocusEntity(switchToPed.Handle);
        playerPed.IsPositionFrozen = false;
        playerPed.IsCollisionEnabled = true;
        playerPed.IsVisible = true;
        playerPed.IsInvincible = false;
        playerPed.Position = to;
        playerPed.Heading = toWh.W;
        var handle = switchToPed.Handle;
        DeletePed(ref handle);
        DeleteEntity(ref handle);

        World.DestroyAllCameras();
    }
    catch (Exception e)
    {
        Debug.WriteLine($"{e.Message} : Exception happened on SpawnManagement.StartSwitch()");
    }

    await Task.FromResult(0);
}