Minimizing game makes screen blue

@MasterQuestMaster wrote:

So, I have my Windows Monogame Direct X project with not much going on.
I'm just drawing some sprites and I have implemented some UI elements with the nice Empty Keys library.

Everytime I minimize the game window and re-open it, the screen becomes the default cornflowe blue color and it doesn't change back.

This is the code in my Draw method:

    GraphicsDevice.Clear(Color.CornflowerBlue);

    //Empty Keys stuff
    this.root.Draw(gameTime.ElapsedGameTime.TotalMilliseconds);

    this.spriteBatch.Begin();

    Vector2 cardPosition = new Vector2(400, 50);
    this.spriteBatch.Draw(texture: this.testCard, position: cardPosition, scale: new Vector2(0.5f));

    //Rectangles
    Vector2 stageLayoutOrigin = this.stageLayout.Bounds.Center.ToVector2();
    Vector2 playAreaOrigin = this.playArea.Center.ToVector2();

    this.spriteBatch.Draw(texture: this.stageLayout, position: playAreaOrigin , origin: stageLayoutOrigin, color: Color.White);

    this.spriteBatch.End();

    base.Draw(gameTime);

I'm using a Nividia GeForce graphics card and Monogame 3.5.

I have confirmed that this does not happen if I create a new blank MonoGame Windows project and draw a picture there.

Edit:
I also use the PreparingDeviceSettings event for settings:

private void Graphics_PreparingDeviceSettings(object sender, PreparingDeviceSettingsEventArgs e)
{
    this.graphics.PreferMultiSampling = true;
    this.graphics.GraphicsProfile = GraphicsProfile.HiDef;
    this.graphics.SynchronizeWithVerticalRetrace = true;
    this.graphics.PreferredDepthStencilFormat = DepthFormat.Depth24Stencil8;

    e.GraphicsDeviceInformation.PresentationParameters.MultiSampleCount = 16;
}

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