Question

I add an unexpected behaviour from C#/WPF

    private void ButtonUp_Click(object sender, RoutedEventArgs e)
    {
        int quant;
        if( int.TryParse(Qnt.Text, out quant))
        {
            string s = ((quant++).ToString());
            Qnt.Text = s;
        }
    }

So, if I get quant as 1, quant will be incremented to 2. But the s string will be 1. Is this a question of precedence?

EDIT:

I re-wrote this as:

            quant++;
            Qnt.Text = quant.ToString();

and now this works as I expected.

Answer 1

You are using the post-increment operator. This evalutates to the original value, and then increments. To do what you want in a one-liner you can use the pre-increment operator instead.

(++quant).ToString();

But even better would be to avoid all such pitfalls and do it like this:

quant++;
string s = quant.ToString();

With the first version you have to think about the order in which things happen. In the second version no thought is required. Always value code clarity more highly than conciseness.

It’s easy to believe that the one-line version is somehow faster, but that’s not true. It might have been true back in the day in 1970s C systems, but even then that I doubt.