Got query to return data.

ConsoleAppTest/Program.cs

@@ -0,0 +1,12 @@
+using Polygon.Client;
+
+Console.WriteLine("Start");
+
+var client = new PolygonClient("");
+var request = new AllTickersRequest();
+var result = await client.GetAllTickersAsync(request);
+var a = result.Results.ToList();
+
+Console.WriteLine(result.Status);
+Console.WriteLine("End");
+Console.ReadKey();