Index: Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.Forms/PropertyClasses/MacroStabilityInwardsDrainageProperties.cs =================================================================== diff -u -rac96d7c315129af851634ed5a4a6800b59ede718 -rc2b77b22666a09fdc2348440c76cd37325aeba7d --- Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.Forms/PropertyClasses/MacroStabilityInwardsDrainageProperties.cs (.../MacroStabilityInwardsDrainageProperties.cs) (revision ac96d7c315129af851634ed5a4a6800b59ede718) +++ Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.Forms/PropertyClasses/MacroStabilityInwardsDrainageProperties.cs (.../MacroStabilityInwardsDrainageProperties.cs) (revision c2b77b22666a09fdc2348440c76cd37325aeba7d) @@ -56,10 +56,12 @@ { throw new ArgumentNullException(nameof(data)); } + if (handler == null) { throw new ArgumentNullException(nameof(handler)); } + this.data = data; propertyChangeHandler = handler; }