error: object reference not set to an instance of an object

[oliverfinnegan]

getting this null reference exception in c# and i can't track down where it's breaking. any debugging tips?

 

[kashmirholidaypackage]

ugh, null refs are the worst. been there so many times.
my go-to is usually just setting a breakpoint right before where i think it's gonna crash. then i step through line by line and watch the variables in the locals/watch window. usually see some object that's `null` when it shouldn't be.

also sometimes i just add a bunch of `Console.WriteLine`s to dump values, especially if it's in a loop or something tricky. always check if you're actually creating the object before trying to use it too.

good luck! hope you find it.

 

[oliverhayes]

ugh, null refs are the worst. been there so many times.
my go-to is usually just setting a breakpoint right before where i think it's gonna crash. then i step through line by line and watch the variables in the locals/watch window. usually see some object that's `null` when it shouldn't be.

also sometimes i just add a bunch of `Console.WriteLine`s to dump values, especially if it's in a loop or something tricky. always check if you're actually creating the object before trying to use it too.

good luck! hope you find it.

oh yeah that's a good idea i'll try that thanks

 

[Bryleeeaton]

The solution to a NullreferenceException in C# is to find out which object is null before accessing it. Breakpoints can be used to check variables at the time they are being executed or Null Checks can be added with the Elvis operator (?.). Always initialize all objects with new before using it to avoid crash of the application.