adjusted project structure

src/Shared/HandyControl_Shared/Collections/ManualObservableCollection`1.cs

@@ -0,0 +1,58 @@
+using System;
+using System.Collections.ObjectModel;
+using System.Collections.Specialized;
+using System.ComponentModel;
+
+namespace HandyControl.Collections
+{
+    [Serializable]
+    public class ManualObservableCollection<T> : ObservableCollection<T>
+    {
+        private const string CountString = "Count";
+
+        private const string IndexerName = "Item[]";
+
+        private int _oldCount;
+
+        private bool _canNotify = true;
+
+        public bool CanNotify
+        {
+            get => _canNotify;
+            set
+            {
+                _canNotify = value;
+
+                if (value)
+                {
+                    if (_oldCount != Count)
+                    {
+                        OnPropertyChanged(new PropertyChangedEventArgs(CountString));
+                    }
+
+                    OnPropertyChanged(new PropertyChangedEventArgs(IndexerName));
+                    OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset));
+
+                }
+                else
+                {
+                    _oldCount = Count;
+                }
+            }
+        }
+
+        protected override void OnPropertyChanged(PropertyChangedEventArgs e)
+        {
+            if (!CanNotify) return;
+
+            base.OnPropertyChanged(e);
+        }
+
+        protected override void OnCollectionChanged(NotifyCollectionChangedEventArgs e)
+        {
+            if (!CanNotify) return;
+
+            base.OnCollectionChanged(e);
+        }
+    }
+}