code for listbox1 to listbox2 move on button clik

[rajesh kunwar]

how can retrive listbox1 to listbox2 without duplicate value

[tlhintoq]

Your goal and question are completely unclear.
What is it that you need to accomplish?

[rajesh kunwar]

how can add items listbox1 to listbox2 without duplicate items in c# codes.?

I am use for this codes ,
listbox1 to listbox2 without duplicate add items ,But this codes add items with duplicate entry.

private void button1_Click(object sender, EventArgs e)
        {
            int  j;
            for (int i = listBox1.Items.Count - 1; i >= 0; --i  )
            {
                j = listBox2.FindStringExact(listBox1.SelectedItem.ToString());
                if (j == -1)
                {
                    listBox2.Items.Add(listBox1.Items[i ]);
                }
                else
                {
                    MessageBox.Show("It fields are already added");
                    return;
                 }

[tlhintoq]

TIP: When you are writing your question, there is a button on the tool bar that wraps the [code] tags around your copy/pasted code. It helps a bunch. Its the button with a '#' on it. More on tags. They're cool. Check'em out.

[tlhintoq]

So you want the item to appear to move from listbox1 to listbox2?
In line 9 you add the item to listbox2
Right after that remove it from listbox1

listBox1.Items.RemoveAt(i);

If the ListBox is new to you, I might suggest you read up on it so you can better understand it. A complete list of its methods along with sample code are available on the MSDN.

http://msdn.microsoft.com/en-us/library/system.windows.forms.listbox.aspx