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-rw-r--r--source/WindowsFormsApplication1/undo.cs8
1 files changed, 8 insertions, 0 deletions
diff --git a/source/WindowsFormsApplication1/undo.cs b/source/WindowsFormsApplication1/undo.cs
new file mode 100644
index 0000000..98fb920
--- /dev/null
+++ b/source/WindowsFormsApplication1/undo.cs
@@ -0,0 +1,8 @@
+using System.Collections.Generic;
+using System.Drawing;
+
+public class undo
+{
+ public Stack<Image> undoStack = new Stack<Image>();
+ public Stack<Image> redoStack = new Stack<Image>();
+} \ No newline at end of file