add function codes

src/Shared/HandyControl_Shared/Data/DisposableObject.cs

@@ -0,0 +1,69 @@
+using System;
+
+namespace HandyControl.Data
+{
+    public class DisposableObject : IDisposable
+    {
+        private EventHandler _disposing;
+
+        public bool IsDisposed { get; private set; }
+
+        public void Dispose()
+        {
+            Dispose(true);
+            GC.SuppressFinalize(this);
+        }
+
+        ~DisposableObject()
+        {
+            Dispose(false);
+        }
+
+        public event EventHandler Disposing
+        {
+            add
+            {
+                ThrowIfDisposed();
+                _disposing += value;
+            }
+            remove
+            {
+                _disposing -= value;
+            }
+        }
+
+        protected void ThrowIfDisposed()
+        {
+            if (IsDisposed) throw new ObjectDisposedException(GetType().Name);
+        }
+
+        protected void Dispose(bool disposing)
+        {
+            if (IsDisposed) return;
+
+            try
+            {
+                if (disposing)
+                {
+                    _disposing?.Invoke(this, EventArgs.Empty);
+                    _disposing = null;
+                    DisposeManagedResources();
+                }
+
+                DisposeNativeResources();
+            }
+            finally
+            {
+                IsDisposed = true;
+            }
+        }
+
+        protected virtual void DisposeManagedResources()
+        {
+        }
+
+        protected virtual void DisposeNativeResources()
+        {
+        }
+    }
+}