title: MaskedTextBox taking only integer
body: <p>I am using MaskedTextBox.I want my textbox to take only digits upto 7 numerics.It should not take any special character like ,.@#,so on....I tried with "ddddddd" as mask but it allows decimal.So t works for decimal only.also tried with 000000</p>
  
  <p>can anybody suggest for correct Mask.</p>
  
  <pre><code>:MaskedTextBox x:Name="TxtTutionFees"
                                         Grid.Row="1"
                                         Width="78"
                                         Height="23"
                                         Margin="142,40,0,0"
                                         HorizontalAlignment="Left"
                                         VerticalAlignment="Top"
                                         AllowSign="False"
                                         DecimalPrecision="2"
                                         GroupNumerals="True"
                                         InputMask="ddddddd"
                                         IsEnabled="False"
                                         PromptChar=" "
                                         TextAlignment="Right"
                                         GotFocus ="TextBox_GotFocus"/&gt;
  </code></pre>