Index: Riskeer/HydraRing/src/Riskeer.HydraRing.Calculation/Parsers/OvertoppingCalculationWaveHeightParser.cs
===================================================================
diff -u -r86594ccd7329d320872573a1d066fe18959d3cea -rdedf7639e658f50abc1c34d3b2af8b573ab03023
--- Riskeer/HydraRing/src/Riskeer.HydraRing.Calculation/Parsers/OvertoppingCalculationWaveHeightParser.cs	(.../OvertoppingCalculationWaveHeightParser.cs)	(revision 86594ccd7329d320872573a1d066fe18959d3cea)
+++ Riskeer/HydraRing/src/Riskeer.HydraRing.Calculation/Parsers/OvertoppingCalculationWaveHeightParser.cs	(.../OvertoppingCalculationWaveHeightParser.cs)	(revision dedf7639e658f50abc1c34d3b2af8b573ab03023)
@@ -85,11 +85,11 @@
             {
                 object waveHeightResult = result[waveHeightColumn];
 
-                double waveHeight = waveHeightResult.GetType() != typeof(DBNull)
-                                        ? Convert.ToDouble(waveHeightResult)
-                                        : double.NaN;
+                double waveHeight = waveHeightResult is DBNull
+                                        ? double.NaN
+                                        : Convert.ToDouble(waveHeightResult);
 
-                bool isOvertoppingDominant = Convert.ToBoolean(result[isOvertoppingDominantColumn]);
+                var isOvertoppingDominant = Convert.ToBoolean(result[isOvertoppingDominantColumn]);
 
                 Output = new OvertoppingCalculationWaveHeightOutput(waveHeight,
                                                                     isOvertoppingDominant);