Help with Search with Pattern: Search for use of member method of a type.

I have the following code:

            class foo
            {
                 void bar()
                 {
                     var result = DateTime.Now.ToUniversalTime();
                 }
            }

I want to replace all .ToUniversalTime() call with  TimeZoneInfo.ConvertTimeToUtc
so I start out by try this simple search pattern:
$date$.ToUniversalTime();
where date is type of DateTime or derived types.

This doesn't find anything. What am I not getting with this pattern searching?
Thanks.