C#

ArrayList list = new ArrayList();
list.Add("item0");
list.Add("item1");
list.Add(null);
list.Add("item3");
Console.WriteLine("With null value at index 2:");
foreach (string str in list)
{
	Console.WriteLine(str);
}
Console.WriteLine("");
list.RemoveAt(2);
Console.WriteLine("Without null value at index 2:");
foreach (string str in list)
{
	Console.WriteLine(str);
}

for (int i = 0; i < list.Count; i++) // at this point Count includes the null at pos 3;
{
  if (list[i] == null) { list.RemoveAt(i); i--; continue;} //on the next loop, list[i] still == null
  //carry on doing the other stuff
}

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"All programmers are playwrights and all computers are lousy actors."

[StructLayout(LayoutKind.Sequential)]
class TOKEN_PRIVILEGES 
{   
  int privilegeCount;
  public LUID_AND_ATTRIBUTES[] Privileges;

  public TOKEN_PRIVILEGES(int size)
  {
    this.privilegeCount = size;
    this.Privileges = new LUID_AND_ATTRIBUTES[size];
  }
}

/// <summary>Operation for SHFileOperation</summary>
public enum SHFOOperation : int 
{
    /// <summary>Move the file(s)</summary>
    Move = 0x1,
    /// <summary>Copy the file(s)</summary>
    Copy = 0x2,
    /// <summary>Delete the file(s)</summary>
    Delete = 0x3,
    /// <summary>Rename the file(s)</summary>
    Rename = 0x4,
}

/// <summary>Flags for SHFileOperation</summary>
[Flags]
public enum SHFOFlags : int 
{
    /// <summary></summary>
    None = 0x000,

    /// <summary>Multiple destination files</summary>
    MultiDestFiles = 0x001,
    /// <summary>Confirm mouse actions</summary>
    ConfirmMouse = 0x002,
    /// <summary>Silent</summary>
    Silent = 0x004,
    /// <summary>Rename files on collision</summary>
    RenameOnCollision = 0x008,
    /// <summary>No confirmation</summary>
    NoConfirmation = 0x010,
    /// <summary>Return a mapping handle for renamed files</summary>
    WantMappingHandle = 0x020,
    /// <summary>Allow undo</summary>
    AllowUndo = 0x040,
    /// <summary>Files only (no folders)</summary>
    FilesOnly = 0x080,
    /// <summary>Simple progress bar</summary>
    SimpleProgress = 0x100,
    /// <summary>Don't confirm directory creation</summary>
    NoConfirmMkDir = 0x200,
    /// <summary>Don't display errors</summary>
    NoErrorUi = 0x400,
    /// <summary>Don't copy NTFS security attributes</summary>
    NoCopySecurity = 0x800,
}