Expression Bodied Local Function in C# 7.0

“Expression-bodied methods” were introduced with C# 6.0, that simplify the syntactic expression for methods in C#. C# 7.0 extend this features for several new members including constructor, destructor, property assessors etc, and we have seen this one of our previous post – Expression – Bodied Members in C# 7.0. C# 7.0, also introduced local function by defining the helper function with in the method itself – Helper function for your local method – Local Function in C# 7.0.

Now the question is – Can we use the Expression Bodied Members for Local Function? Yes, You can!

Let’s consider the below example of Local Function.

static void Main(string[] args)
{
int val = 100;
int MyLocalFunction(int value1, int value2)
{
return val + value1 + value2;
}

Console.WriteLine(MyLocalFunction(10, 10));
}

Related Tip : Helper function for your local method â€“ Local Function in C# 7.0

You can have this local method represented as Expression bodied method as shown in the below snippet.

static void Main(string[] args)
{
int val = 100;

int MyLocalFunction(int value1, int value2) => value1 + value2 + val;

Console.WriteLine(MyLocalFunction(10, 10));
}