C#

[Serializable]
public class ImageInfo {
    public ImageInfo();
    public ImageInfo(string fullPath, int x, int y);
    public string Path { get; set; }
    public Point Location { get; set; }
}

private Stack<ImageInfo> m_Stack = new Stack<ImageInfo>();
...
m_Stack.Push(new ImageInfo(imagePath, 50, 50));
...
// Undo a particular action
ImageInfo old = m_Stack.Pop();

using (FileStream fs = new FileStream("yourFilePath", FileMode.Create, FileAccess.Write
      , FileShare.None, 0x1000, FileOptions.Encrypted | FileOptions.SequentialScan) {
    new BinaryFormatter().Serialize(fs, m_Stack.ToArray());
}

using (FileStream fs = new FileStream("yourFilePath", FileMode.Open, FileAccess.Read
      , FileShare.Read, 0x1000, FileOptions.Encrypted | FileOptions.SequentialScan) {
    m_Stack = new Stack<ImageInfo>((ImageInfo[])new BinaryFormatter().Deserialize(fs));
}

public bool ThinksSkyIsFalling = false {get; set;}

chickenLittle.ThinksSkyIsFalling = true;

anumadhu wrote:

there is an issue with the order of execution.

simworld wrote:

Is there any system defined function such as strcmp,strcpy as used in C

<br />
string oldValue = "OldValue";<br />
string newValue = oldValue;<br />

string a = "This is a test";
string b = "This is another test";
 
if (a == b) {
   // do something
}

string a = "This is a test";
string b = a;