#1,217 – C# 6.0 – Using Expression-Bodied Methods
November 3, 2014 5 Comments
In C# 5.0, you could use a lambda expression wherever a delegate instance was expected. For example:
Func doubleMyNumber = (i) => 2 * i;
In C# 6.0, you use something similar for the body of a function member, known as an “expression-body definition” to define the method. This simplifies the syntax for simple methods. For example:
public class Dog
{
public Dog(string name, int age)
{
Name = name;
Age = age;
}
public string Name { get; protected set; }
public int Age { get; set; }
public void AgeIncrement() => Age++;
public int AgeInDogYears() => Age * 7;
}
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Technically, it isn’t a lambda expression.
While this is using lambda syntax, it isn’t a lambda expression and the compiler isn’t converting anything to delegates. BTW, great work on this C# and the WPF series – very useful.
Does the syntax allow you to enclose the lambda expression within parentheses, for better readability?
Example:
Func doubleMyNumber = ((i) => 2 * i); // Parens added
Yes, you can always put parens around the lambda (wherever it’s used).