Fixed .NET for Spark naming

Fixed .NET for Spark naming (Spark.NET is not approved)
Fixed default language of Notebook to pySpark
Added more useful next steps

Author: MikeRys

articles/synapse-analytics/spark/apache-spark-development-using-notebooks.md

@@ -6,7 +6,7 @@ author: ruixinxu
 ms.service: synapse-analytics 
 ms.topic: conceptual 
 ms.subservice:
-ms.date: 04/15/2020
+ms.date: 05/01/2020
 ms.author: ruxu 
 ms.reviewer: 
 ---
@@ -50,12 +50,12 @@ There are multiple ways to add a new cell to your notebook.
 
 ### Set a primary language
 
-Azure Synapse Studio notebooks support four spark languages:
+Azure Synapse Studio notebooks support four Apache Spark languages:
 
-* pyspark (python)
-* spark (Scala)
-* sparkSQL
-* Spark.NET (C#)
+* pySpark (Python)
+* Spark (Scala)
+* SparkSQL
+* .NET for Apache Spark (C#)
 
 You can set the primary language for new added cells from the dropdown list in the top command bar.
 
@@ -70,9 +70,9 @@ You can use multiple languages in one notebook by specifying the correct languag
 |%%pyspark| Python | Execute a **Python** query against Spark Context.  |
 |%%spark| Scala | Execute a **Scala** query against Spark Context.  |  
 |%%sql| SparkSQL | Execute a **SparkSQL** query against Spark Context.  |
-|%%csharp | Spark.NET C# | Execute a **Spark.NET C#** query against Spark Context. |
+|%%csharp | .NET for Spark C# | Execute a **.NET for Spark C#** query against Spark Context. |
 
-The following image is an example of how you can write a PySpark query using the **%%pyspark** magic command or a SparkSQL query with the **%%sql** magic command in a **Spark(Scala)** notebook. Notice that the primary language for the notebook is set to Scala.
+The following image is an example of how you can write a PySpark query using the **%%pyspark** magic command or a SparkSQL query with the **%%sql** magic command in a **Spark(Scala)** notebook. Notice that the primary language for the notebook is set to pySpark.
 
    ![synapse-spark-magics](./media/apache-spark-development-using-notebooks/synapse-spark-magics.png)
 
@@ -113,7 +113,7 @@ The IntelliSense features are at different levels of maturity for different lang
 |PySpark (Python)|Yes|Yes|Yes|Yes|Yes|Yes|Yes|Yes|
 |Spark (Scala)|Yes|Yes|Yes|Yes|-|-|-|Yes|
 |SparkSQL|Yes|Yes|-|-|-|-|-|-|
-|Spark.NET (C#)|Yes|-|-|-|-|-|-|-|
+|.NET for Spark (C#)|Yes|-|-|-|-|-|-|-|
 
 ### Format text cell with toolbar buttons
 
@@ -387,5 +387,8 @@ Using the following keystroke shortcuts, you can more easily navigate and run co
 
 ## Next steps
 
+- [Quickstart: Create an Apache Spark pool (preview) in Azure Synapse Analytics using web tools](../quickstart-apache-spark-notebook.md)
+- [What is Apache Spark in Azure Synapse Analytics](apache-spark-overview.md)
+- [Use .NET for Apache Spark with Azure Synapse Analytics](spark-dotnet.md)
 - [.NET for Apache Spark documentation](/dotnet/spark?toc=/azure/synapse-analytics/toc.json&bc=/azure/synapse-analytics/breadcrumb/toc.json)
 - [Azure Synapse Analytics](https://docs.microsoft.com/azure/synapse-analytics)