C#

<code>
public int CountNodes(Node n)
{
    if(ExitCondition)    // what's your exit condition?
    {
        return ?;        // what should you return for your base 
case?
    }
    else
    {
    // what do you need to return here. What are you going to pass to the recursive call?
        return ? + CountNodes(?);     
    } 
}
</code>

while {not at end of list)
    Incrememnt counter
loop
return counter

int count(POINTER head)<br />
{<br />
	return head!=NULL ? count(head->next)+1 : 0 ;<br />
}

StringTokenizer st = new StringTokenizer("011010101");<br />
string convertedString = "";<br />
while(st.HasMoreTokens)<br />
{<br />
    char nextChar = st.NextToken();<br />
    convertedString += nextChar;<br />
}

// Set up the DataSet
DataSet ds = new DataSet();
			
// Set up the Data Table
DataTable t = new DataTable("Students");
t.Columns.Add("StudentID", typeof(int));
t.Columns.Add("StudentName", typeof(string));

ds.Tables.Add(t);

// Fake Data
for(int i = 0; i < 5; i++)
{
	DataRow r = t.NewRow();
	r["StudentID"] = i;
	r["StudentName"] = "Test Student " + i.ToString();
	t.Rows.Add(r);
}

// Bind to the Combo Box
comboBox1.DataSource = ds.Tables[0];  
// NOTE that my data source is the table, not the dataset

comboBox1.ValueMember = "StudentID";
comboBox1.DisplayMember = "StudentName";

private void comboBox1_SelectedIndexChanged(object sender, System.EventArgs e)
{
	MessageBox.Show(comboBox1.SelectedValue.ToString());
}