[Event Hubs] Send/Receive Quickstart Tweaks

The purpose of these changes is to adjust some verbiage to better reflect
the prerequisites needed for the quickstart, clarifying that the SDK tooling is
being discussed and not the target framework of the output.

Additionally, updated mentions of `.NET Core` to `.NET` to reflect that the
library may be used to build both .NET Core and .NET framework applications and
is the recommended Event Hubs library for both.

Author: jsquire

articles/event-hubs/TOC.yml

@@ -42,7 +42,7 @@
       href: event-hubs-storm-getstarted-receive.md
   - name: Send and receive events (old versions/packages)
     items:
-    - name: .NET Core (Microsoft.Azure.EventHubs)
+    - name: .NET (Microsoft.Azure.EventHubs)
       href: event-hubs-dotnet-standard-getstarted-send.md
     - name: Java (azure-eventhubs)
       href: event-hubs-java-get-started-send.md

articles/event-hubs/get-started-dotnet-standard-send-v2.md

@@ -17,8 +17,8 @@ ms.author: spelluru
 
 ---
 
-# Send events to and receive events from Azure Event Hubs - .NET Core (Azure.Messaging.EventHubs) 
-This quickstart shows how to send events to and receive events from an event hub using the **Azure.Messaging.EventHubs** .NET Core library. 
+# Send events to and receive events from Azure Event Hubs - .NET (Azure.Messaging.EventHubs) 
+This quickstart shows how to send events to and receive events from an event hub using the **Azure.Messaging.EventHubs** .NET library. 
 
 > [!IMPORTANT]
 > This quickstart uses the new **Azure.Messaging.EventHubs** library. For a quickstart that uses the old **Microsoft.Azure.EventHubs** library, see [Send and receive events using Microsoft.Azure.EventHubs library](event-hubs-dotnet-standard-getstarted-send.md). 
@@ -31,7 +31,7 @@ If you're new to Azure Event Hubs, see [Event Hubs overview](event-hubs-about.md
 To complete this quickstart, you need the following prerequisites:
 
 - **Microsoft Azure subscription**. To use Azure services, including Azure Event Hubs, you need a subscription.  If you don't have an existing Azure account, you can sign up for a [free trial](https://azure.microsoft.com/free/) or use your MSDN subscriber benefits when you [create an account](https://azure.microsoft.com).
-- **Microsoft Visual Studio 2019**. The Azure Event Hubs client library makes use of new features that were introduced in C# 8.0.  You can still use the library with older versions of C#, but some of its functionality won't be available.  To enable these features, you must [target .NET Core 3.0](/dotnet/standard/frameworks#how-to-specify-target-frameworks) or [specify the language version](/dotnet/csharp/language-reference/configure-language-version#override-a-default) you want to use (8.0 or above). If you're using Visual Studio, versions before Visual Studio 2019 aren't compatible with the tools needed to build C# 8.0 projects. Visual Studio 2019, including the free Community edition, can be downloaded [here](https://visualstudio.microsoft.com/vs/)
+- **Microsoft Visual Studio 2019**. The Azure Event Hubs client library makes use of new features that were introduced in C# 8.0.  You can still use the library with  previous C# language versions, but the new syntax won't be available. To make use of the full syntax, it is recommended that you use the the [.NET Core SDK](https://dotnet.microsoft.com/download) 3.0 or higher with the the [language version](https://docs.microsoft.com/dotnet/csharp/language-reference/configure-language-version#override-a-default) set to `latest`. If you're using Visual Studio, versions before Visual Studio 2019 aren't compatible with the tools needed to build C# 8.0 projects. Visual Studio 2019, including the free Community edition, can be downloaded [here](https://visualstudio.microsoft.com/vs/).
 - **Create an Event Hubs namespace and an event hub**. The first step is to use the [Azure portal](https://portal.azure.com) to create a namespace of type Event Hubs, and obtain the management credentials your application needs to communicate with the event hub. To create a namespace and an event hub, follow the procedure in [this article](event-hubs-create.md). Then, get the **connection string for the Event Hubs namespace** by following instructions from the article: [Get connection string](event-hubs-get-connection-string.md#get-connection-string-from-the-portal). You use the connection string later in this quickstart.
 
 ## Send events