Solutions to fix the NullReferenceException (part 2)
To prevent the
Solution 1: Check whether an object contains a null value or not using an if condition, as shown below:
In the above example,
To prevent the
NullReferenceException exception, check whether the reference type parameters are null or not before accessing them.Solution 1: Check whether an object contains a null value or not using an if condition, as shown below:
In the above example,
if(cities == null) checks whether the cities object is null or not. If it is null then display the appropriate message and return from the function.