Csharp

I am currently going through a .NET/React course and one lesson was about CancellationToken which I have seen before but never really understood. I decided to take some notes. Cancellation Token A CancellationToken in .NET is a mechanism that lets you signal to running code that it should stop work, usually because the operation is no longer needed or the user canceled it. It’s commonly used in asynchronous and long-running operations to make them cooperative and cancellable. ...

Checking for null is important in programming to avoid potential runtime errors, prevent crashes, and ensure the reliability and robustness of your code. In C#, we can check for null in few different ways, depending on the context. So far I have been using following methods: Using the equality operator 1 2 3 4 5 6 7 object obj = null; if (obj == null) { // if null, do something } Using the is keyword 1 2 3 4 5 6 7 object obj = null; if (obj is null) { // if null, do something } Using the ReferenceEquals() method 1 2 3 4 5 6 7 object obj = null; if (ReferenceEquals(obj, null)) { // if null, do something } Using the != opeartor 1 2 3 4 5 6 7 object obj = null; if (obj != null) { // object is not null } Using the null-conditional operator ?. 1 2 3 var text = null; int? length = text?.Length; // length will be null, if text is null Using the null-coalescing operator ?? 1 2 3 var text = null; var result = text ?? "default non-null value"; // if text is null, use the default value

I have recently started learning C# language, which, compared to python, is a lot more verbose and structured. C# syntax is influenced by C and C++ languages. Part of CS50 Introduction to Computer Science course used C language, so having seen the syntax before helps a lot. However, working mostly with Python, there is a lot of difference. As I like to do, I will try to summarize key points as it helps me to learn and understand the language more. ...