when i selected item i want to go check if condition like below i mention my code

hi Prerak Patel
 

ya i solve that error but still now i get new problem please give me idea
 
i bind xml file in combobox but i selected item that ll be cheked and show wt i want so selected item not working proper
below is my code please resolve it.
 
i bind like this
DataSet ds = new DataSet();
//XmlDocument xmldc = new XmlDocument();
ds.ReadXml(path + @"\Refrigirater.xml");
comboBox1.DataSource = ds.Tables[0];
comboBox1.DisplayMember = "name";
comboBox1.ValueMember = "id";
in xml file i have
Mubai,Kolkata.
and slected item changed that is
 

private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)         {                           if(comboBox1.SelectedItem.ToString()==Mumbai)              {                                  textBox1.Text =(You Selected :  + comboBox1.SelectedItem.ToString());              }              else if(comboBox1.SelectedItem.ToString(==Kolkata)              {                  textBox1.Text = (You Selected :  + comboBox1.SelectedItem.ToString());              }

 

 
i want when i selected mumbai goto mumbai ifcondition....but dont go it.
 

please resolve my error.
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Thanks
Venkat.S