Using the clipboard to copy and paste text is simple. Use the Clipboard object's SetText method to copy text to the clipboard.

// Copy text to the clipboard.
private void btnCopy_Click(object sender, EventArgs e)
{
    Clipboard.SetText(txtCopy.Text);
}

Use the Clipboard object's GetText method to retrieve the text that's in the clipboard.

// Paste text from the clipboard.
private void btnPaste_Click(object sender, EventArgs e)
{
    txtPaste.Text = Clipboard.GetText();
}