C#

<br />
//in form1<br />
public Event Eventhandler OnButton1Click;<br />
<br />
void form1_buttonClicked( objects sender , EventArgs args)<br />
{<br />
   //handler tied to the actual button click on form 1<br />
   //do other stuff<br />
<br />
   //tell any subscribers we've been clicked<br />
   if (OnButton1Click != null)<br />
     OnButton1Click( sender , args );<br />
}<br />

<br />
///form2<br />
<br />
public void MyHandler( object sender , EventArgs args)<br />
{<br />
///button on form1 has been clicked<br />
}<br />
<br />
<br />
//in ctor or some initialiser of Form2<br />
<br />
form1.OnButton1Click += MyHandler;<br />
<br />

form2 frm = new form2();
frm.label2.Text = textbox1.Text;
frm.Show();
//or ShowDialog

<br />
public bool clicked;<br />

<br />
            if (clicked)<br />
            {<br />
                //do whatever you want to do when button1 on form1 is clicked<br />
            }<br />

<br />
        private void button1_Click(object sender, EventArgs e)<br />
        {<br />
            Form2 frm = new Form2();<br />
            frm.clicked = true;<br />
            frm.Show();<br />
        }<br />

XmlDocument xmldoc = new XmlDocument();
FileStream fs = new FileStream(Xmlfilepath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
xmldoc.Load(fs);

XmlNodeList xmlnode = xmldoc.GetElementsByTagName("ABC");

//replace ABC with yours tagname

for (int a = 0; a < xmlnode.Count; a++)
{
 if (xmlnode[a].Attributes[0].Value == "requirednode") // match your attributes
  {
     //codes
  }
}