fixing headers issue

Author: craigcaseyMSFT

articles/cognitive-services/Computer-vision/includes/quickstarts-sdk/csharp-sdk.md

@@ -11,6 +11,8 @@ ms.date: 12/05/2019
 ms.author: pafarley
 ---
 
+<a name="HOLTop"></a>
+
 [Reference documentation](https://docs.microsoft.com/dotnet/api/overview/azure/cognitiveservices/client/computervision?view=azure-dotnet) | [Library source code](https://github.com/Azure/azure-sdk-for-net/tree/master/sdk/cognitiveservices/Vision.ComputerVision) | [Package (NuGet)](https://www.nuget.org/packages/Microsoft.Azure.CognitiveServices.Vision.ComputerVision/) | [Samples](https://azure.microsoft.com/resources/samples/?service=cognitive-services&term=vision&sort=0)
 
 ## Prerequisites