Question

I want to create a if statement that recognizes which string has been removed from a specific list box. I thought i could do an if statement similar to the one below and get it to work but it tells me it has invalid arguements – if anyone can guide me it would appreciated

private void button2_Click(object sender, EventArgs e)
    {

        listBox2.Items.RemoveAt(listBox2.SelectedIndex); 
        if(listBox2.Items.RemoveAt(listBox2.SelectedItems.ToString().Equals("Test")))
        {
         picturebox.Image = null;
        }
    }

Answer 1

You need to check the SelectedItem before removing it:

private void button2_Click(object sender, EventArgs e)
{
    if (listBox2.SelectedIndex != -1)
    {
        if (listBox2.SelectedItem.ToString().Equals("Test")))
            picturebox.Image = null;

        listBox2.Items.RemoveAt(listBox2.SelectedIndex); 
    }
}

I’ve also added a check to ensure that an item is actually selected (since you would get errors otherwise).