Azure Cosmos DB .NET V3 SDK now generally available

Azure Cosmos DB [.NET V3 SDK](https://github.com/Azure/azure-cosmos-dotnet-v3/) incorporates performance improvements (including the new streaming API), a more intuitive, idiomatic programming model with developer-friendly APIs, and new change feed pull and push programming models. The SDK is fully open-sourced and .NET Standard 2.0 compatible, has a new namespace – [Microsoft.Azure.Cosmos](https://www.nuget.org/packages/Microsoft.Azure.Cosmos/) – as well as new names for database, container and item resources. To get started, follow our [quickstart](https://aka.ms/cosmos-dotnet-v3-quickstart) and provide feedback on [GitHub](https://aka.ms/CosmosDotnetSDKV3). [Learn more on GitHub](https://github.com/Azure/azure-cosmos-dotnet-v3/) [Learn more about our tutorial](https://aka.ms/cosmos-dotnet-v3-quickstart) * Azure Cosmos DB * Features * [ Azure Cosmos DB](https://azure.microsoft.com/en-gb/products/cosmos-db/)