Search results
Question marks have different meaning in C# depending on the context. The Null-Conditional Operator (MSDN, What does the question mark in member access mean in C#?) Console.Write(myObject?.Items?[0].ToString()); The Conditional Operator/Ternary Operator (MSDN, Benefits of using the conditional ?: (ternary) operator) return isTrue ? "Valid" : "Lie";
9 Answers. Sorted by: 554. 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.
25 lip 2023 · The conditional operator ?:, also known as the ternary conditional operator, evaluates a Boolean expression and returns the result of one of the two expressions, depending on whether the Boolean expression evaluates to true or false, as the following example shows:
20 sie 2024 · The question mark in C# plays a crucial role in indicating nullable types, working with the conditional operator, and handling potential null results in LINQ queries. Understanding how and where to use the question mark is essential for writing robust and concise C# code.
10 gru 2015 · For this article on question marks in C#, however, it is enough to simply show how the question mark is used, which was done in that example above. Null-Conditional Member Access Operator ( ?. This much-needed operator was new for C# 6.0 (Visual Studio 2015).
5 sty 2008 · Let’s look at the following SQL statement. SELECT COALESCE (null, notes, description) FROM contacts WHERE contact_id=10. It returns value of field notes if notes is not null and value of description otherwise. It returns null only if description and notes are both nulls.
31 lip 2024 · In this article. You use several operators and expressions to access a type member. These operators include member access (.), array element or indexer access ([]), index-from-end (^), range (..), null-conditional operators (?. and ? []), and method invocation (()).
