Game.Run.cs

private void RunGame(bool useBlockingRun)
{
    try
    {
        try
        {
            this.graphicsDeviceManager = this.Services.GetService(typeof(IGraphicsDeviceManager)) as IGraphicsDeviceManager;
            if (this.graphicsDeviceManager != null)
            {
                this.graphicsDeviceManager.CreateDevice();
            }
            this.Initialize();
            this.inRun = true;
            this.BeginRun();
            this.gameTime.ElapsedGameTime = TimeSpan.Zero;
            this.gameTime.TotalGameTime = this.totalGameTime;
            this.gameTime.IsRunningSlowly = false;
            this.Update(this.gameTime);
            this.doneFirstUpdate = true;
            if (!useBlockingRun)
            {
                if (this.host != null)
                {
                    this.host.StartGameLoop();
                }
                this.endRunRequired = true;
            }
            else
            {
                if (this.host != null)
                {
                    this.host.Run();
                }
                this.EndRun();
            }
        }
        catch (NoSuitableGraphicsDeviceException noSuitableGraphicsDeviceException1)
        {
            NoSuitableGraphicsDeviceException noSuitableGraphicsDeviceException = noSuitableGraphicsDeviceException1;
            if (!this.ShowMissingRequirementMessage(noSuitableGraphicsDeviceException))
            {
                throw;
            }
        }
        catch (NoAudioHardwareException noAudioHardwareException1)
        {
            NoAudioHardwareException noAudioHardwareException = noAudioHardwareException1;
            if (!this.ShowMissingRequirementMessage(noAudioHardwareException))
            {
                throw;
            }
        }
    }
    finally
    {
        if (!this.endRunRequired)
        {
            this.inRun = false;
        }
    }
}