private static void IntegerTextBox_PastingHandler(object sender, DataObjectPastingEventArgs e)
        {
            var Sender = sender as IntegerTextBox;
            if (Sender == null)
                return;

            Sender.OnPaste(e);
        }

        private void OnPasted(object sender, DataObjectPastingEventArgs e)
        {
            myWordsAdded = true;
            mySelectionStartPosition = Selection.Start;
            mySelectionEndPosition = Selection.IsEmpty ? Selection.End.GetPositionAtOffset(0, LogicalDirection.Forward) : Selection.End;

            // Hyperlink detection will be done in OnTextChanged()
        }

 private static void tb_Pasting(object sender, DataObjectPastingEventArgs e)
 {
     var pastedText = e.DataObject.GetData(typeof(string)) as string;
     if (!IsTextAllowed(pastedText))
     {
         e.CancelCommand();
     }
 }

        private void UcQuery_OnPaste(object sender, DataObjectPastingEventArgs e)
        {
            var isText = e.SourceDataObject.GetDataPresent(DataFormats.UnicodeText, true);
            if (!isText) return;
            var text = e.SourceDataObject.GetData(DataFormats.UnicodeText) as string;

            ucQuery.Tag = !string.IsNullOrWhiteSpace(text);
        }

 private void Key_Pasting(object sender, DataObjectPastingEventArgs e)
 {
     Regex r = new Regex("[^a-zA-Z]");
     if (r.IsMatch(e.DataObject.GetData(typeof(string)).ToString()))
     {
         MessageBox.Show(this, "Keys can only contain alphabetic letters!");
         e.CancelCommand();
     }
 }

 private void RichTextBox_Pasting(object sender, DataObjectPastingEventArgs e)
 {
     RichTextBox richTextBox = sender as RichTextBox;
       string textData = (e.DataObject.GetData(DataFormats.UnicodeText) as string).Replace("\n", " ").Replace("\r", "");
       new TextRange(richTextBox.Selection.Start, richTextBox.Selection.End).Text = string.Empty;
       richTextBox.CaretPosition = richTextBox.CaretPosition.GetPositionAtOffset(0, LogicalDirection.Forward) ?? richTextBox.CaretPosition;
       richTextBox.CaretPosition.InsertTextInRun(textData);
       e.CancelCommand();
 }

        private void OnPaste(object sender, DataObjectPastingEventArgs e)
        {
            var isText = e.SourceDataObject.GetDataPresent(System.Windows.DataFormats.Text, true);
            if (!isText) 
                return;

            var text = e.SourceDataObject.GetData(DataFormats.Text) as string;

        }

 private static void PastingHandler(object sender, DataObjectPastingEventArgs e)
 {
     if (e.DataObject.GetDataPresent(typeof(String)))
     {
         var text = (String)e.DataObject.GetData(typeof(String));
         if (!IsTextAllowed(text)) e.CancelCommand();
     }
     else e.CancelCommand();
 }

 public static void IntegerPastingHandler(ref object sender, ref DataObjectPastingEventArgs e)
 {
     if (e.DataObject.GetDataPresent(typeof(String)))
     {
         String text = (String)e.DataObject.GetData(typeof(String));
         if (!HandlingUserInput.IsIntegerText(text)) e.CancelCommand();
     }
     else e.CancelCommand();
 }

        private void OnPaste(object sender, DataObjectPastingEventArgs e)
        {
            var pastedText = (string) e.SourceDataObject.GetData(DataFormats.UnicodeText);

            if (ProductIdIsNotValid(pastedText))
            {
                e.CancelCommand();
            }
        }

 private void OnPaste(object sender, DataObjectPastingEventArgs e)
 {
     if (!(sender is RichTextBox))
     return;
       string textData = e.DataObject.GetData(DataFormats.Text) as string;
       (sender as RichTextBox).Document.ContentEnd.InsertTextInRun(textData);
       (sender as RichTextBox).CaretPosition = (sender as RichTextBox).Document.ContentEnd;
       e.CancelCommand();
 }

 private void noPaste(object sender, DataObjectPastingEventArgs e)
 {
     if (e.DataObject.GetDataPresent(typeof(String)))
     {
         String text = (String)e.DataObject.GetData(typeof(String));
         if (textAllowed(text)) e.CancelCommand();
     }
     else e.CancelCommand();
 }

 /// <summary>
 /// This method handles paste and drag/drop events onto the TextBox.  It restricts the character
 /// set to numerics and ensures we have consistent behavior.
 /// </summary>
 /// <param name="sender">TextBox sender</param>
 /// <param name="e">EventArgs</param>
 private static void OnClipboardPaste(object sender, DataObjectPastingEventArgs e)
 {
     string text = e.SourceDataObject.GetData(e.FormatToApply) as string;
     if (!string.IsNullOrEmpty(text))
     {
         if (text.Count(ch => !Char.IsNumber(ch)) == 0)
             return;
     }
     e.CancelCommand();
 }

        private void IPTextBox_Paste(object sender, DataObjectPastingEventArgs e)
        {

            if (e.DataObject.GetDataPresent(typeof(string)))
            {
                string value = e.DataObject.GetData(typeof(string)).ToString();
                setIP(value);
            }

            e.CancelCommand();
        }

 protected virtual void OnPaste(DataObjectPastingEventArgs e)
 {
     var IsTextPresent = e.SourceDataObject.GetDataPresent(System.Windows.DataFormats.Text, true);
     if (IsTextPresent)
     {
         var TextValue = e.SourceDataObject.GetData(DataFormats.Text) as string;
         if (CheckTextFormat(TextValue))
             return;
     }
     e.CancelCommand();
 }

 private void textBoxNumeric_Pasting(object sender, DataObjectPastingEventArgs e)
 {
     string input = string.Empty;
     if (e.DataObject.GetDataPresent(typeof(string)))
     {
         if (!this.isNumericInput((string)e.DataObject.GetData(typeof(string))))
             e.CancelCommand();
     }
     else
         e.CancelCommand();
 }

 private static void TextBoxPastingEventHandler(object sender, DataObjectPastingEventArgs e)
 {
     var textBox = (sender as TextBox);
     var clipboard = e.DataObject.GetData(typeof(string)) as string;
     // TODO : clipboard = ValidateValue(clipboard);
     if (textBox != null && !string.IsNullOrEmpty(clipboard))
     {
         textBox.Text = clipboard;
     }
     e.CancelCommand();
     e.Handled = true;
 }

 private void CheckPasteFormat(object sender, DataObjectPastingEventArgs e)
 {
     var isText = e.SourceDataObject.GetDataPresent(System.Windows.DataFormats.Text, true);
     if (isText)
     {
         var text = e.SourceDataObject.GetData(DataFormats.Text) as string;
         if (CheckFormat(text))
         {
             return;
         }
     }
     e.CancelCommand();
 }

 private void TextBoxPasting(object sender, DataObjectPastingEventArgs e)
 {
     if (e.DataObject.GetDataPresent(typeof(String)))
     {
         var text = (String)e.DataObject.GetData(typeof(String));
         if (!IsTextAllowed(text))
         {
             e.CancelCommand();
         }
     }
     else
     {
         e.CancelCommand();
     }
 }

 private void TextBoxPaste_CheckNumbers(object sender, DataObjectPastingEventArgs e)
 {
     if (e.DataObject.GetDataPresent(typeof(String)))
     {
         String text = (String)e.DataObject.GetData(typeof(String));
         if (!StringHelpers.IsTextAllowed(text))
         {
             e.CancelCommand();
         }
     }
     else
     {
         e.CancelCommand();
     }
 }