C# Question
Predefined type 'System.ValueTuple´2´ is not defined or imported
I've installed Visual Studio 15 Preview 3 and tried to use the new tuple feature
static void Main(string[] args)
{
var x = DoSomething();
Console.WriteLine(x.x);
}
static (int x, int y) DoSomething()
{
return (1, 2);
}
When I compile i get the error
Predefined type 'System.ValueTuple´2´ is not defined or imported
According to the blog post, this features should be "on" by default.
What did I do wrong?
Answer
If you're targeting .NET 4.6.1 or lower or .NET Core, you need to install the NuGet package System.ValueTuple:
Install-Package "System.ValueTuple" -IncludePrerelease
Source (Stackoverflow)