add array info

Author: Niall Brennan

src/connections/sources/catalog/libraries/server/csharp/index.md

@@ -326,6 +326,17 @@ analytics.Reset()
 ## Compatibility
 This library targets `.NET Standard 2.0`. See the [list of compatible platforms](https://docs.microsoft.com/en-us/dotnet/standard/net-standard?tabs=net-standard-2-0){:target="_blank"}.
 
+## FAQ
+### Arrays
+To send an array as an event property you can reference the repo [here](https://github.com/segmentio/Serialization.NET/blob/main/Tests/JsonUtilityTest.cs#L24). For example, to send an array of strings the following code could be implemented:
+```c#
+List<string> listOfStrings = new List<string> { "test1", "test2", "test3" };
+
+JsonObject customerJsonObj = new JsonObject
+{
+    ["event_name"] = new JsonArray(listOfStrings.ConvertAll(o => (JsonElement)o))
+}; 
+```
 ## Changelog
 [View the Analytics-CSharp changelog on GitHub](https://github.com/segmentio/analytics-csharp/releases){:target="_blank"}.