Update README.md

Author: codebrain

README.md

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 # Elastic Common Schema .NET
 
-This repository contains .NET integrations that use the Elastic Common Schema (ECS), including popular .NET logging frameworks.
+This repository contains .NET integrations that use the Elastic Common Schema (ECS), including popular .NET logging frameworks. Read the [announcement post](https://www.elastic.co/blog/elastic-common-schema-dotnet-library-and-integrations-released-for-elasticsearch).
 
 The Elastic Common Schema defines a common set of fields for ingesting data into Elasticsearch. A common schema helps you correlate data from sources like logs and metrics or IT operations analytics and security analytics. Further information on ECS can be found in the official [Elastic documentation](https://www.elastic.co/guide/en/ecs/current/index.html) or [github repository](https://github.com/elastic/ecs).