Are you looking the String.Equals? There is no such thing as a System.Equals method. You can find an Equals method on the StringUtils component in the Toolbox (which was added in builds 8.0.1075 and higher).
No. You can still use the String.Equals but it takes a little more effort. First, you'd need to create a String object. To add a String object, you need to click the button on the toolbar to "Add Constructor for Type" and type 'System.String' to create the object. Then you can use the Equals method from that object.
It is easier to just use the StringUtils component in the toolbox to get the Equals method.