c# - Get body from Outlook email [Drag’n’Drop]

Question

I’m working with WPF and I’m trying to make a drag’n’drop textbox.
In this textbox I want to get the body of an email which I drag from outlook.
The code works but I think I need something to “reset” the ActiveExplorer cause now it only shows the last “NEW” email which I drag into the textbox.

Example:

Drag email 1 -> Textbox - Shows email 1

Drag email 2 -> Textbox - Shows email 2

Drag email 1 -> Textbox - Shows email 2 and email 1 will not be displayed because it already exists in the ActiveExplorer and it will show email 2.

Hope my question is a bit clear to you..
Thanks in advance!

XAML code:

    <TextBox 
    Name="myTextbox"  
    AllowDrop="True" 
    PreviewDragEnter="email_DragEnter"
    PreviewDrop="email_Drop" />

XAML code behind:

    private void email_DragEnter(object sender, DragEventArgs e)
    {
        e.Effect = DragDropEffects.Copy;
    }

    private void email_Drop(object sender, DragEventArgs e)
    {
        Outlook.ApplicationClass oApp = new Outlook.ApplicationClass();
        Outlook.Explorer oExplorer = oApp.ActiveExplorer();
        Outlook.Selection oSelection = oExplorer.Selection;

        foreach (object item in oSelection)
        {
            Outlook.MailItem mi = (Outlook.MailItem)item;
            myTextbox.Text = mi.Body.ToString();
        }
    }

Answer 1

I moved the declaration of oApp out of DragDrop event as below, and it works as expected.

void Startup()
{
    _Outlook = new Outlook.Application();
}

Outlook.Application _Outlook = null;

private void Form1_DragEnter(object sender, DragEventArgs e)
{
    e.Effect = DragDropEffects.Copy;
}

private void Form1_DragDrop(object sender, DragEventArgs e)
{
    richTextBox1.Text = "";
    Outlook.Explorer oExplorer = _Outlook.ActiveExplorer();
    Outlook.Selection oSelection = oExplorer.Selection;

    foreach (object item in oSelection)
    {
        Outlook.MailItem mi = (Outlook.MailItem)item;
        richTextBox1.AppendText(mi.Body.ToString() + "
----------------------------------------
");
    }
}

--------EDIT--------

OR Is it possible that you display only the last item because of this loop?

foreach (object item in oSelection)
{
    Outlook.MailItem mi = (Outlook.MailItem)item;
    myTextbox.Text = mi.Body.ToString(); //<--- Only last items text
}