C#

<?xml version="1.0" encoding="ISO-8859-1"?>
<agenda>
    <Appointment>
      <Id> 7  </Id>
      <Date> 20060426  </Date>
      <Time> 120000  </Time>
      <Subject> test </Subject>
      <Description> testttt  </Description>
      <Place> paris  </Place>
      <Modtime> 182204  </Modtime>
    </Appointment>
    <Appointment>
      <Id> 8  </Id>
      <Date> 20060426  </Date>
      <Time> 120000  </Time>
      <Subject> whatever  </Subject>
      <Description> whateverrr  </Description>
      <Place> where ever  </Place>
      <Modtime> 182204  </Modtime>
    </Appointment>
</agenda>

<?xml version="1.0" encoding="ISO-8859-1"?>
<agenda>
    <Appointment>
      <Id> 7  </Id>
      <Date> 20060426  </Date>
      <Time> 120000  </Time>
      <Subject> test </Subject>
      <Description> testttt  </Description>
      <Place> paris  </Place>
      <Modtime> 182204  </Modtime>
    </Appointment>
</agenda>

<Appointment>
     <Id> 8  </Id>
     <Date> 20060426  </Date>
     <Time> 120000  </Time>
     <Subject> whatever  </Subject>
     <Description> whateverrr  </Description>
     <Place> where ever  </Place>
     <Modtime> 182204  </Modtime>
   </Appointment>

string origPath = @"F:\demo.xml";
            string inPath = @"F:\demo1.xml";
            XElement xmlObject = XElement.Load(origPath);
            var xDoc = xmlObject.Descendants("Appointment");
            XElement xmlObject1 = XElement.Load(inPath);
            var xDoc1 = xmlObject1.Descendants("Appointment");
            var notIn = xDoc1.Except(xDoc);
            //var notIn1 = xDoc.Except(notIn);
            foreach (XElement ele in notIn)
            {
                richTextBox1.AppendText(ele.ToString() + "\n");
                
            }

<Appointment>
      <Id> 7  </Id>
      <Date> 20060426  </Date>
      <Time> 120000  </Time>
      <Subject> test </Subject>
      <Description> testttt  </Description>
      <Place> paris  </Place>
      <Modtime> 182204  </Modtime>
    </Appointment>
    <Appointment>
      <Id> 8  </Id>
      <Date> 20060426  </Date>
      <Time> 120000  </Time>
      <Subject> whatever  </Subject>
      <Description> whateverrr  </Description>
      <Place> where ever  </Place>
      <Modtime> 182204  </Modtime>
    </Appointment>

double[] numbers1 = { 2.0, 2.1, 2.2, 2.3, 2.4, 2.5 };
double[] numbers2 = { 2.2 };

 IEnumerable<double> onlyInFirstSet = numbers1.Except(numbers2);

 foreach (double number in onlyInFirstSet)
    richTextBox1.AppendText(number.ToString() +"\n");

I have a C# application with a ListView and GridView control.
I would like to simulate the mouse click in both control simultaneously.
I would like to  work this functionality even if the wind is not foreground.
So I used PostMessage to do the selection.

/// <summary>
/// Select rows.
/// </summary>
/// <param name="rows">List of rows to be selected.</param>
/// <param name="selctionType">SelectionType.</param>
private void PerformSelection( List<int> rows, SelectionType selctionType )
{
   // timer1.Start();
    IntPtr wParam = MK_CONTROL;

    switch ( selctionType )
    {
        case SelectionType.Ctrl:
            wParam = MK_CONTROL;
            dataGridView1.VirtualKey = Keys.Control;
            break;
        case SelectionType.Shift:
            wParam = MK_SHIFT;
            dataGridView1.VirtualKey = Keys.Shift;
            break;
        case SelectionType.CtrlShift:
            wParam = MK_CONTROLSHIFT;
            break;
    }

    dataGridView1.Focus();

    foreach (int rowIndex in rows)
    {
        SetScrollPositionListView( rowIndex );
        NativeMethods.PostMessage( listView1.Handle, WM_LBUTTONDOWN, wParam,
                                  (IntPtr) ( ( listView1.Items[rowIndex].Position.Y << 16 ) | listView1.Items[rowIndex].Position.X ) );
        NativeMethods.PostMessage( listView1.Handle, WM_LBUTTONUP, wParam,
                                   (IntPtr) ( ( listView1.Items[rowIndex].Position.Y << 16 ) | listView1.Items[rowIndex].Position.X ) );

        SetScrollPosition(rowIndex);

        dataGridView1.Focus();
        // Get position of dgv row in dgv.
        Rectangle dgvRect = dataGridView1.GetRowDisplayRectangle(rowIndex, true);


        NativeMethods.PostMessage(dataGridView1.Handle, WM_LBUTTONDOWN, wParam, (IntPtr)((dgvRect.Top + 1 << 16) | dgvRect.Left + 1));
        NativeMethods.PostMessage(dataGridView1.Handle, WM_LBUTTONUP, wParam, (IntPtr)((dgvRect.Top + 1 << 16) | dgvRect.Left + 1));
    }
}

/// <summary>
/// Scroll to invisible rows.
/// </summary>
/// <param name="rowIndex">Index of row to be selected.</param>
private void SetScrollPositionListView( int rowIndex )
{
    listView1.EnsureVisible( rowIndex );
}

/// <summary>
/// Get the location of of row to be selected.
/// </summary>
/// <param name="rowIndex">Index of row to be selected.</param>
/// <returns>Row location.</returns>
private Point GetRowLocationListView( int rowIndex )
{
    // Scroll to row position.
    SetScrollPositionListView( rowIndex );

    // Get position of list view with respect t0 desktop.
    Point listViewlocation = listView1.PointToScreen( Point.Empty );

    Rectangle listViewRect = listView1.GetItemRect( rowIndex );

    // Calculate row co ordinate.
    int left = listViewlocation.X + listViewRect.X + ( listViewRect.Width / 2 );
    int right = listViewlocation.Y + listViewRect.Y + ( listViewRect.Height / 2 );
    return new Point( left, right );
}