diff --git a/src/Razor/Microsoft.CodeAnalysis.Razor/src/EventHandlerTagHelperDescriptorProvider.cs b/src/Razor/Microsoft.CodeAnalysis.Razor/src/EventHandlerTagHelperDescriptorProvider.cs
index 9c83533509ff..bf10d62238fa 100644
--- a/src/Razor/Microsoft.CodeAnalysis.Razor/src/EventHandlerTagHelperDescriptorProvider.cs
+++ b/src/Razor/Microsoft.CodeAnalysis.Razor/src/EventHandlerTagHelperDescriptorProvider.cs
@@ -34,6 +34,12 @@ public void Execute(TagHelperDescriptorProviderContext context)
                 return;
             }
 
+            var targetAssembly = context.Items.GetTargetAssembly();
+            if (targetAssembly is not null && !SymbolEqualityComparer.Default.Equals(targetAssembly, eventHandlerAttribute.ContainingAssembly))
+            {
+                return;
+            }
+
             var eventHandlerData = GetEventHandlerData(context, compilation, eventHandlerAttribute);
 
             foreach (var tagHelper in CreateEventHandlerTagHelpers(eventHandlerData))