# Microsoft.AspNetCore.Components.Infrastructure

``` diff
 namespace Microsoft.AspNetCore.Components.Infrastructure {
+    [AttributeUsageAttribute(1, AllowMultiple=false)]
+    public abstract class RazorComponentApplicationAttribute : Attribute, IRazorComponentApplication {
+        protected RazorComponentApplicationAttribute();
+        public abstract ComponentApplicationBuilder GetBuilder();
+    }
 }
```

