Unable to cast object of type 'boilersGraphics.ViewModels.SnapPointViewModel' to type 'boilersGraphics.ViewModels.IRect'.

[sofiosomkhisvili]

Please describe the details of the error

System.InvalidCastException
at System.Linq.Enumerable.CastIterator[TResult](IEnumerable source)+MoveNext()
at System.Collections.Generic.List1..ctor(IEnumerable1 collection)
at System.Linq.Enumerable.ToList[TSource](IEnumerable1 source) at boilersGraphics.Models.Layer.UpdateAppearance(IEnumerable1 items, Boolean backgroundIncluded)
at boilersGraphics.Models.LayerTreeViewItemBase.UpdateAppearanceBothParentAndChild()
at boilersGraphics.Models.Layer.<.ctor>b__1_10(Unit x)
at System.Reactive.AnonymousSafeObserver1.OnNext(T value) in /_/Rx.NET/Source/src/System.Reactive/AnonymousSafeObserver.cs:line 43 at System.Reactive.Sink1.ForwardOnNext(TTarget value) in //Rx.NET/Source/src/System.Reactive/Internal/Sink.cs:line 49
at System.Reactive.ObserveOnObserverNew1.DrainStep(ConcurrentQueue1 q) in //Rx.NET/Source/src/System.Reactive/Internal/ScheduledObserver.cs:line 561
at System.Reactive.ObserveOnObserverNew1.DrainShortRunning(IScheduler recursiveScheduler) in /_/Rx.NET/Source/src/System.Reactive/Internal/ScheduledObserver.cs:line 507 at System.Reactive.ObserveOnObserverNew1.<>c.<.cctor>b__17_0(IScheduler scheduler, ObserveOnObserverNew1 self) in /_/Rx.NET/Source/src/System.Reactive/Internal/ScheduledObserver.cs:line 497 at System.Reactive.Concurrency.DispatcherScheduler.<>c__DisplayClass11_01.b__0()
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)