stackOverFlow 's answer
I've encountered this a couple times and keep forgetting what causes it. I ran into this when I renamed the namespace on my code behind file but not in my XAML.
So check if you've done the same. They need to match since they are both part of a partial class
namespace ZZZ
{/// <summary>/// Interaction logic for MainWindow.xaml/// </summary>publicpartialclassMainWindow{//...}}<!-- XAML --><Window x:Class="ZZZ.MainWindow">
本文详细解析了在.NET应用中遇到的Namespace命名与XAML元素命名不一致导致的问题,提供了排查和解决方法,帮助开发者避免此类常见错误。

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