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docs/guides/getting_started/samples/intro/structure.cs

@@ -70,6 +70,8 @@ class Program
         // your project is targeting .NET 4.5.2 or lower. You'll need
         // to adjust your project's target framework to 4.6 or higher
         // (instructions for this are easily Googled).
+        // If you *need* to run on .NET 4.5 for compat/other reasons,
+        // the alternative is to 'return Task.Delay(0);' instead.
         return Task.CompletedTask;
     }