UWP项目无法使用System.Windows.Vector，求可行解决方案

Hey, I feel your pain—rolling your own Vector struct is definitely a tedious chore. Let’s break down why you’re hitting this issue and the practical fixes you can use right away:

First, the root cause: System.Windows.Vector is a WPF-specific type from WindowsBase.dll. While UWP does reference this DLL indirectly as part of the framework, most WPF-exclusive types (including this Vector) are not exposed to UWP projects—hence why you can’t access it even though the build system says it’s auto-referenced.

Here are your best options:

1. Use UWP’s Native Vector Types #

Skip writing your own struct entirely by leveraging the vector types built into UWP’s supported APIs:

• System.Numerics.Vector2: This is the go-to for 2D vector operations (which matches what System.Windows.Vector does). It supports all standard vector math (addition, subtraction, scaling, dot product, etc.) out of the box. Example usage:

  using System.Numerics;
  
  var vector = new Vector2(10, 20);
  var scaledVector = vector * 2.5f;
  float dotProduct = Vector2.Dot(vector, new Vector2(5, 10));
  

• Windows.Foundation.Point: If you just need a simple X/Y coordinate pair (without heavy math), this is a lightweight built-in type that works seamlessly in UWP UI scenarios.

2. Create a Thin Adapter Layer (For Legacy Code) #

If you’re migrating WPF code that relies heavily on System.Windows.Vector, you can write a small adapter to convert between your existing code and UWP’s native types instead of rewriting everything:

public struct VectorAdapter
{
    public double X { get; set; }
    public double Y { get; set; }

    // Convert from System.Numerics.Vector2
    public static implicit operator VectorAdapter(Vector2 v)
    {
        return new VectorAdapter { X = v.X, Y = v.Y };
    }

    // Convert to System.Numerics.Vector2
    public static implicit operator Vector2(VectorAdapter v)
    {
        return new Vector2((float)v.X, (float)v.Y);
    }

    // Add any WPF Vector-like methods you need
    public double Length => Math.Sqrt(X * X + Y * Y);
}

This way, you can keep your existing logic mostly intact while using UWP’s supported under-the-hood types.

3. Verify Your Project’s Target Version #

Ensure your UWP project is targeting a recent enough Windows 10 version (at least Windows 10 16299, Fall Creators Update). Older versions may have limited support for System.Numerics types. You can check this in your project properties under "Application" -> "Target version".

内容的提问来源于stack exchange，提问作者Muzib