In Winforms I have 72 buttons with images that are supposed toggle back and forth between different images when clicked, but I can’t find why the first click doesn’t make them toggle, all clicks after the first click seem to work as expected.

For each button I use the following code in the Form1_Load method:

for(int heightIndex = 0; heightIndex < 12; heightIndex++)
{
    for(int widthIndex = 0; widthIndex < 6; widthIndex++)
    {
        allTiles[heightIndex, widthIndex].CausesValidation = false;
        allTiles[heightIndex, widthIndex].Click += TileClicked;
    }
}

The TileClicked method looks like this:

private void TileClicked(object sender, EventArgs e)
{
    Button tile = sender as Button;
    InvertState(tile);
}

And InvertState looks like this:

private void InvertState(Button tile)
{
    if(tile.Image == cat)
    {
        tile.Image = dog;
    }
    else
    {
        tile.Image = cat;
    }
}

Why does this code only work after the first click?