✅ Predefined type 'System.ValueTuple2' is not defined or imported
I made sure to install the Systems.ValueTuple NuGet Package and I keep getting this error. I went to make sure the target framework is correct and I don't have that option so I did the latest windows build. Here is a copy of the code
25 Replies
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices.WindowsRuntime;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;
// The Blank Page item template is documented at http://go.microsoft.com/fwlink/?LinkId=402352&clcid=0x409
namespace Methods
{
/// <summary>
/// An empty page that can be used on its own or navigated to within a Frame.
/// </summary>
public sealed partial class MainPage : Page
{
public MainPage()
{
this.InitializeComponent();
}
private void calculateClick(object sender, RoutedEventArgs e)
{
int calculatedValue = 0;
try
{
int leftHandSide = System.Int32.Parse(lhsOperand.Text);
int rightHandSide = System.Int32.Parse(rhsOperand.Text);
if (addition.IsChecked.HasValue && addition.IsChecked.Value)
{
calculatedValue = addValues(leftHandSide, rightHandSide);
showResult(calculatedValue);
}
else if (subtraction.IsChecked.HasValue && subtraction.IsChecked.Value)
{
calculatedValue = subtractValues(leftHandSide, rightHandSide);
showResult(calculatedValue);
}
else if (multiplication.IsChecked.HasValue && multiplication.IsChecked.Value)
{
calculatedValue = multiplyValues(leftHandSide, rightHandSide);
showResult(calculatedValue);
}
else if (division.IsChecked.HasValue && division.IsChecked.Value)
{
int division, remainder;
(division, remainder) = divide(leftHandSide, rightHandSide);
result.Text = $" remainder ";
}
}
catch (Exception caught)
{
expression.Text = "";
result.Text = caught.Message;
}
}
private int addValues(int leftHandSide, int rightHandSide)
{
expression.Text = $"{leftHandSide} + {rightHandSide}";
return leftHandSide + rightHandSide;
}
private int subtractValues(int leftHandSide, int rightHandSide)
{
expression.Text = $"{leftHandSide} - {rightHandSide}";
return leftHandSide - rightHandSide;
}
private int multiplyValues(int leftHandSide, int rightHandSide)
{
expression.Text = $"{leftHandSide} * {rightHandSide}";
return leftHandSide * rightHandSide;
}
private (int, int) divide(int leftHandSide, int rightHandSide)
{
expression.Text = $" / ";
int division = leftHandSide / rightHandSide;
int remainder = leftHandSide % rightHandSide;
return (division, remainder);
}
private void showResult(int answer) => result.Text = answer.ToString();
}
}
System.ValueTuple is not a nuget
Unless you're maybe using some ancient-ass version of C# for some godforsaken reason that didn't have valuetuples yetif you search it up in the nuget manager it pops up and you can install it...with or without it, i still get this godforsaken error Predefined type 'System.ValueTuple`2' is not defined or imported for whatever the fuck reason
What's your .NET and C# version?
is the lines generating the error
Some ancient versions of C# might get
ValueTuple support from that nuget, but not necessarily the short (a, b) syntax
So, what's the version you're using?idk how to check it but i just downloaded the lastest .net version 7.0.4
Open the csproj file
its open
And?
<TargetFramework> and <LangVersion> are what you're looking forit says those aren't found in my solution
They're in the csproj file
Open it in a text editor
it says it isnt there either
That's an old csproj format
For some reason you made this project using some ancient version of .NET
Like, ancient ancient version, because even the ancient and dead .NET Framework started using the new format eventually
it's for a current university class...the book it has us reading is based on VS 2017
what the fuckkk
Ah, well, university explains using 1999 technologies
Your professor probably hasn't learned anything new since 2001, and it was a recipe for granola bars
In any case, instead of using the cool new value tuples, you can use the old
Tuple<int, int> as the return type
And use Tuple.Create() to make it
Alternatively, use new versions of .NET
$newprojectWhen creating a new project, prefer using .NET over .NET Framework, unless you have a very specific reason to be using .NET Framework.
.NET Framework is now legacy code and only get security fix updates, it no longer gets new features and is not recommended.
https://cdn.discordapp.com/attachments/569261465463160900/899381236617855016/unknown.png
i figured when it asks the target version i want to upgrade to and i select windows 11 it should update it to the newest release
"Windows 11" is neither the version of the framework nor the version of the language
It's the version of the Windows SDK your app will use
is there any reliable way to quickly update these projects to the newest .net framework?
There's the upgrade assistant you can try
i was able to fix the problem entirely by updating the .net.universalwindowsplatform package in nuget...
thanks for all your help!!!
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