Validating numeric values in c sharp
Let's return to this example, with a small change: ).
The result of this work is that you can use the null conditional operator in scenarios that reference return values from property accessors, indexers, or method access without worrying about possible side-effects.
The event-handling scenario is certainly the most common delegate usage for delegate is null, all messages are published. Finally, there is one other scenario in which the null conditional operator comes in quite handy: variables that may implement an interface.
This usage is particularly useful with In practice, I've only used this idiom when I create generic classes that create objects of the types specified by their type parameters.
Ask yourself how much of your code must check a variable against the null value. (If not, I'd worry about the quality of your codebase.) In every one of those null checks, the null conditional operator may help you to write cleaner, more concise code.
We all want our code to be as clear and concise as possible, so let's explore this feature. In the earlier example, I used the null conditional operator on both member accesses.
I've been very aggressive in updating existing code bases with this feature because the new syntax is so much more concise and clear.
I've replaced any number of null checks with the null conditional operator.
They are essentially unique types that allow you to assign symbolic names to integral values.Bill Wagner, author of Effective C#: 50 Specific Ways to Improve Your C#, Second Edition, shows how to use the new null conditional operator in C# 6 to reduce code size, decrease bug counts, and make code more readable..As I've been using C# 6 in my projects, I'm finding more and more scenarios in which this operator is the simplest and clearest way to express my intent.In the C# tradition, they are strongly typed, meaning that an enum of one type may not be implicitly assigned to an enum of another type even though the underlying value of their members are the same.Along the same lines, integral types and enums are not implicitly interchangable.
Because the replacement can change code behavior, it does require adding tests to make sure that no other code relies on the existing hand-coded algorithm.