Merge pull request #10239 from mikejwhitty/patch-1

change syntax highlight hint to c# from sql

Author: v-dirichards

docs/relational-databases/json/use-for-json-output-in-sql-server-and-in-client-apps-sql-server.md

@@ -93,7 +93,7 @@ SET Details =
 
  The following example shows how to retrieve the JSON output of a query into a StringBuilder object in a C# client app. Assume that the variable `queryWithForJson` contains the text of a `SELECT` statement with a `FOR JSON` clause.  
 
-```sql
+```csharp
 var queryWithForJson = "SELECT ... FOR JSON";
 using(var conn = new SqlConnection("<connection string>"))
 {