Checking for Null Values
Learn how to handle null values in C# by checking for null in nullable reference type and nullable value type variables and use operators.
Checking whether a nullable reference type or nullable value type variable currently contains null is important because if we do not, a NullReferenceException can be thrown, which results in an error.
Handling null values
We should check for a null value before using a nullable variable, as shown in the following code:
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// check that the variable is not null before using itif (thisCouldBeNull != null){// access a member of thisCouldBeNullint length = thisCouldBeNull.Length; // could throw exception...}
C# 7 introduced is combined with the ! (not) operator as an alternative to !=, as shown in the ...
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