observable collection

PacticeSolution/ObervableCollectionSample/PersonCollection.cs

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+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ObervableCollectionSample
+{
+    public class PersonCollection : ObservableCollection<Person>
+    {
+        public PersonCollection()
+        {
+            InitInstance();
+        }
+
+        private void InitInstance()
+        {
+            this.Add(new Person("neymar"));
+            this.Add(new Person("messi"));
+            this.Add(new Person("ronaldo"));
+            this.Add(new Person("park"));
+            this.Add(new Person("sonny"));
+        }
+    }
+}