diff --git a/MapControl/WinUI/MapControl.WinUI.csproj b/MapControl/WinUI/MapControl.WinUI.csproj
index e1458837..dec94bca 100644
--- a/MapControl/WinUI/MapControl.WinUI.csproj
+++ b/MapControl/WinUI/MapControl.WinUI.csproj
@@ -2,6 +2,7 @@
     <PropertyGroup>
         <TargetFramework>net8.0-windows10.0.17763.0</TargetFramework>
         <RuntimeIdentifiers>win-x86;win-x64;win-arm64</RuntimeIdentifiers>
+        <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
         <UseWinUI>true</UseWinUI>
         <DefineConstants>WINUI</DefineConstants>
         <RootNamespace>MapControl</RootNamespace>