C# 7 was released in March 2017 as part of the release of Visual Studio 2017. As mentioned on the .NET Blog by Mads Torgersen, C# 7 was focused on the consumption of data, simplifying code and improving performance. The biggest features to come out of C# 7 were tuples and pattern matching.
With tuples, developers can return more than one value from functions. Traditionally C# has allowed developers to return multiple values from a single function by building a structure and returning an instance of the structure.
You could also make use of out parameters which use the out keyword for ...
