With Blazor prefix it's easier to detect where this switch belongs.

Author: ilonatommy

src/ProjectTemplates/Directory.Build.props

@@ -4,7 +4,7 @@
   <PropertyGroup>
     <!-- The .csproj files in this folder do not actually produce .dll's. They are only present to produce .nupkgs and enable Visual Studio support -->
     <IsProjectReferenceProvider>false</IsProjectReferenceProvider>
-    <DisableThrowNavigationException>true</DisableThrowNavigationException>
+    <BlazorDisableThrowNavigationException>true</BlazorDisableThrowNavigationException>
   </PropertyGroup>
 
   <Import Project="TemplateProjects.props" Condition=" !$(IsTestProject) AND '$(IsTestAssetProject)' != 'true'" />