Fix most of CA1725 warnings (#8154)

* Fix CA1725 warning

* Address requested changes

Algorithm.CSharp/BasicPythonIntegrationTemplateAlgorithm.cs

@@ -49,7 +49,7 @@ namespace QuantConnect.Algorithm.CSharp
 
         /// OnData event is the primary entry point for your algorithm. Each new data point will be pumped in here.
         /// Slice object keyed by symbol containing the stock data
-        public override void OnData(Slice data)
+        public override void OnData(Slice slice)
         {
             if (!Portfolio.Invested)
             {
@@ -63,4 +63,4 @@ namespace QuantConnect.Algorithm.CSharp
             }
         }
     }
-}
+}