Local Functions In C#

C# 7.0 adds a new feature called local functions, which allows local methods to be defined and called within a method. This wasn’t possible in the previous versions. The following code snippet defines a method named "Add" inside the "Main" method and calls within the "Main" method.

static void Main(string[] args)
{

  int Add(int a, int b)
  {
    return a + b;
  }

  Console.WriteLine(Add(3,4));
  Console.ReadKey();
}

As its name suggests, a local function is available to the method it is defined inside only. 

Summary

Local functions is a new concept introduced in C# 7.0. In this article, we learned how to write and use a local function. 

Next C# 7.0 Feature - Literal Improvements in C# 7.0  

References

References used to write this article,

https://blogs.msdn.microsoft.com/dotnet/2016/08/24/whats-new-in-csharp-7-0/