It means that the value type in question is a nullable type . Nullable types are instances of the System. Nullable struct. A nullable type can represent the correct range of values for its underlying value type, plus an additional null value.22 Nis 2010
Read moreAre null checks bad?
Generally speaking, returning null from a method should be considered really bad . This forces the user of the method to do null checks and create conditional code paths.
Read moreWhere do you put null checks?
If you have implemented layering in your project, good place to do null checks are the layers that receives data externally .
Read moreWhat is a missing null check?
“Missing Null Check” IS the coding error a NullPointerException is the vulnerability leading to DOS. And pointer dereference isn’t a vulnerability… everytime you use a * in C you are dereference a pointer.
Read moreAre null checks good?
It is a good idea to check for null explicitly because: You can catch the error earlier. You can provide a more descriptive error message.
Read moreHow do you check for null and null?
How to Test for NULL Values? It is not possible to test for NULL values with comparison operators, such as =, <, or <>. We will have to use the IS NULL and IS NOT NULL operators instead.
Read moreIS null check C?
In C or C++, there is no special method for comparing NULL values. We can use if statements to check whether a variable is null or not .
Read more