Lambda expression breakpoints and debugger watches in Rider
Note: make sure to check out our series about Rider’s debugger!
Lambda expression breakpoints
When placing a breakpoint on a line with multiple statements, for example where one is a lambda expression, Rider will ask us whether we want to pause program execution on the entire statement, or just on the lambda:
When we then start the debugger, Rider will break on every execution of the lambda (tip: for large collections you may want to look into dependent breakpoints). This allows us to inspect variables within the lambda’s context:
Lambda expressions in debugger watches
Rider’s debugger now provides support for lambda expressions when adding Watches (Alt+Insert).
Depending on the underlying type, this may execute a database query or enumerate an
IEnumerable. Once the debugger evaluates and executes the expression, it visualizes the results:
Download Rider and give it a try! We’d love to hear your feedback.