break points and immediate window

I am working through tutorial to understand break points and immediate window in C#.
its says if I put a break point at variable int sum = 0;
and at sum = sum1+1;
enter <?sum1> in immediate window( no brackets)
I can use F10 to walk through and see value change from 0 to 1
but as I hit F10 - it steps through but never goes to variable in command button and I never see value = 1.
Can you tell me how to use break points and immediate window to see how value changes from 0 to 1
thank you
public partial class Form1 : Form
    {
        int sum1 = 0;
 
        public Form1()
        {
            InitializeComponent();
        }
 
        private void Form1_Load(object sender, EventArgs e)
        {
           
 
        }
 
        private void button1_Click(object sender, EventArgs e)
        {
            sum1= sum1 + 1;
 
        }
    }

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davetoughAsked:
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Fernando SotoRetiredCommented:
Hi davetough;

The immediate window works something like the DOS command window. You enter a command and hit enter and it will execute the command.

So placing the break point on the statements int sum1 = 0; and sum1= sum1 + 1;, when the program stops on the statement then go to the immediate window and type the command, ?sum1 followed by the Enter key, and the immediate window will print the current value of sum1. Press F10 then go back to the immediate window and type ?sum1 followed by the Enter key again and it will print the current value of sum1. In the immediate window you can press the Up Arrow key to automatically type the last command press it again and get the command before that and so on. Then you must press the Enter key again to execute that command, it will not automatically reprint the last command.

If you want to watch the value of sum1 automatically change as you press F10 when the values changes in the program then use the Watch window.

Fernando

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