C# 8.0 Pocket Reference by Joseph Albahari
Author:Joseph Albahari
Language: eng
Format: epub
Publisher: O'Reilly Media
Published: 2019-11-18T16:00:00+00:00
x => { return x * x; };
Lambda expressions are used most commonly with the Func and Action delegates, so you will most often see our earlier expression written as follows:
Func<int,int> sqr = x => x * x;
The compiler can usually infer the type of lambda parameters contextually. When this is not the case, you can specify parameter types explicitly:
Func<int,int> sqr = (int x) => x * x;
Here’s an example of an expression that accepts two parameters:
Func<string,string,int> totalLength = (s1, s2) => s1.Length + s2.Length; int total = totalLength ("hello", "world"); // total=10;
Assuming Clicked is an event of type EventHandler, the following attaches an event handler via a lambda expression:
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