XNA Textures dissappear when game window is resized

Question

[SOLVED] - See linked post in the P.S.

I have a set of Texture2Ds generated in the Load method with this function:

Texture Generation:

private Texture2D[,] createTextureSet(TileInfo[,] map)
    {
        Texture2D[,] texSet = new Texture2D[map.GetLength(0), map.GetLength(1)];

        using (SpriteBatch sprb = new SpriteBatch(GraphicsDevice))
        {
            for (int row = 0; row < map.GetLength(0); row++)
            {
                System.Threading.Thread.Sleep(10);
                for (int col = 0; col < map.GetLength(1); col++)
                {
                    RenderTarget2D renderer = new RenderTarget2D(this.GraphicsDevice, 300, 300);
                    System.Threading.Thread.Sleep(2);
                    GraphicsDevice.SetRenderTarget(renderer);
                    renderer.Name = map[row, col].buildings[0].buildingType;
                    GraphicsDevice.Clear(Color.Transparent);
                    sprb.Begin(SpriteSortMode.Immediate, BlendState.NonPremultiplied);
                    sprb.Draw(TextureFromFile(resourceDirectory + @"Images\Tile Backgrounds\" + map[row, col].tileType + @"\" + map[row, col].tileBackground + ".png"), renderer.Bounds, Color.White);
                    sprb.Draw(TextureFromFile(resourceDirectory + @"Images\Buildings\" + map[row, col].buildings[0].buildingType + ".png"), (Vector2)map[row, col].buildings[0].pointWithinTile, Color.White);
                    sprb.End();
                    texSet[row, col] = renderer;
                }
            }
        }

        GraphicsDevice.SetRenderTarget(null);
        return texSet;
    }

The tiles are drawn on the screen using the following code:

Texture Rendering

for (int tx = -1; tx < 2; tx++)
        {
            for (int ty = -1; ty < 2; ty++)
            {
                gameSpriteBatch.Draw(mapTextureSet[gameCharacter.characterTile.tileX + tx, gameCharacter.characterTile.tileY + ty], determinePositionToDrawTile(gameCharacter, map[gameCharacter.characterTile.tileX + tx, gameCharacter.characterTile.tileY + ty], tx, ty, resizeX, resizeY), null, Color.White, 0f, Vector2.Zero, new Vector2(resizeX, resizeY), SpriteEffects.None, 0f);
            }
         }

These textures are then drawn on the screen based on where on the map the player is. The game runs fine, until the game window is resized by the user. After that, only the character sprite remains on the screen during the redraws, and the screen remains the default Color.BlanchedAlmond background of my game. Any help is thanked in advance.

[ ! ] P.S. [ ! ]

Before marking this as a duplicate! I have looked at this and tried most of the applicable solutions from it, none of which have worked, so I assume that this error is deeper than that one.

Answer 1

I'm pretty sure that this is exactly the problem described and solved in my answer that you linked. In which case, "Option 3" in that answer is probably the easiest way to get your code working.

(And, indeed, from comments, it seems like that has worked for you.)

But to finish what I was typing up, you can verify that this is the problem by adding this code right after you create your RenderTarget2D renderer:

renderer.ContentLost += (s,a) => System.Diagnostics.Debug.Assert(false);

If that assertion triggers, then you know that your texture has gone missing due to the device reset.