add ignoreTextChanged

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

@@ -1,4 +1,5 @@
 using System;
+using System.Collections.Generic;
 using System.Collections.ObjectModel;
 using System.Collections.Specialized;
 using System.ComponentModel;
@@ -41,6 +42,19 @@ namespace HandyControl.Collections
             }
         }
 
+        public ManualObservableCollection()
+        {
+            
+        }
+
+        public ManualObservableCollection(List<T> list) : base(list != null ? new List<T>(list.Count) : list) => CopyFrom(list);
+
+        public ManualObservableCollection(IEnumerable<T> collection)
+        {
+            if (collection == null) throw new ArgumentNullException(nameof(collection));
+            CopyFrom(collection);
+        }
+
         protected override void OnPropertyChanged(PropertyChangedEventArgs e)
         {
             if (!CanNotify) return;
@@ -54,5 +68,18 @@ namespace HandyControl.Collections
 
             base.OnCollectionChanged(e);
         }
+
+        private void CopyFrom(IEnumerable<T> collection)
+        {
+            var items = Items;
+            if (collection != null)
+            {
+                using var enumerator = collection.GetEnumerator();
+                while (enumerator.MoveNext())
+                {
+                    items.Add(enumerator.Current);
+                }
+            }
+        }
     }
 }