C# 7 Improvements : Out variables and Tuples

     C# 7 doesn't have any major updates, It has bunch useful improvements. I am going to cover two of these improvements in this article. First one I am going to focus on here is the out variables.

Out Variables

In the previous versions of C#, we had to declare the out variable before we use it.

In C# 7, we can do the same thing in one line of code. It's easier to read and we don't need to add an initial value.

    You can use implicitly typed local variable so you can use var when you are creating out variables.

The out variable we created in if statements, is available in the outer scope. Here is another example.

Tuples

Tuple class has been with us since Visual Studio 2010. If you have never used Tuples before, Let me try to explain them little bit here.
 A tuple is a data structure that has specific number and sequence of elements. It allows you to combine multiple values in different types into a single object. Best part of it is, you don't need to create a custom class for it. One of the biggest differences between tuples and class was, Tuples did not have any custom property names until C#7.

Following example creates a Tuple object and its members names will be Item1, Item2 and Item3

In C# 7, we can give them custom names, rather than calling them Items. We can do this in couple of ways. C#7 allows us to specify names for the items on both side of the assignment.

OR

If you like to learn more about the Tuples, here is a link to MSDN documentation.