How To Measure The Number Of Open Database Connections

I am trying to determine if I have a database connection leak. So I need to see the number of open connections. I have some simple test code that creates a leak:

protected void Page_Load(object sender, EventArgs e)
{
for(int i = 0; i < 100; i++)
{
SqlConnection sql = new SqlConnection(@"Data Source=.SQLExpress;UID=sa;PWD=fjg^%kls;Initial Catalog=ABC");
sql.Open();
}
}

Note there is no .Close and this does infact crash after being run 3 times in quick succession.

In order to measure the leak I am running the Performance monitor and measuring SQLServer: General Statistics/User Connections:

However, these seem to be zero when I run my code:

What should I change to actually see the connections?

ANSWER

I have approved an answer below. Even though it doesn't use the performance tools, its good enough for my use. Bottom line is I wanted to see how many connections remain open after opening a web page and this did the trick.