c#-7.0

Do you know why this works: public struct UserNameAndPassword { public string username; public string password; } [HttpPost] public IActionResult Create([FromBody]UserNameAndPassword usernameAndPassword) { Console.WriteLine(usernameAndPassword); if (this.AuthenticationService.IsValidUserAndPasswordCombination(usernameAndPassword.username, usernameAndPassword.password)) return new ObjectResult(GenerateToken(usernameAndPassword.username)); return BadRequest(); } But when I replace it with a tuple, this doesn’t work? [HttpPost] public IActionResult Create([FromBody](string username, string

In C# 7, how do I write an Expression Bodied Constructor like this using 2 parameters. public Person(string name, int age) { Name = name; Age = age; } A way to do this is to use a tuple and a deconstruction to allow multiple assignments in one expression: public class Person { public string Name { get; } public int Age { get; } public Person(string name, int age) => (Name, Age) = (name, age); } As of C# 7.1 (introduced with Visual Studio 2017 Update 3), the compiler code will now optimise away the actual construction and deconstruction of the tuple. So this approach has no performance overhead

What are the minimum .NET framework and CLR version requirements for running C# 7? Also, do I need VS 2017 to compile C# 7? dmeglio You do NOT need to target .NET 4.6 and above, that is incorrect. To use Tuples, you need the System.ValueTuple NuGet package. Right on https://www.nuget.org/packages/System.ValueTuple/ you can see it says it supports 4.5 and above, and actually, it supports 4.0 and above. And if you want to get crazy, if you create your own System.ValueTuple class that does exactly what that package does, it will work back on .NET 3.5 and probably older too. For "Task-like" types,