public TextWindow(FileElement element) : this()
{
this.element = element;
MemoryStream ms = new MemoryStream();
element.SaveTo(ms);
TextRange textRange = new TextRange(richTextBox.Document.ContentStart, richTextBox.Document.ContentEnd);
ms.Position = 0;
textRange.Load(ms, DataFormats.Text);
textRange.ApplyPropertyValue(Paragraph.MarginProperty, new Thickness(0));
//Получаємо хеш файла
ms.Position = 0;
textRange = new TextRange(richTextBox.Document.ContentStart, richTextBox.Document.ContentEnd);
textRange.Save(ms, DataFormats.Text);
ms.Position = 0;
textHash = Crypto.GetMD5(ms);
ms.Dispose();
richTextBox.Focus();
}