Validate Email with Regular Expressions

string ValidEmailExpression = @"^(([A-Za-z0-9]+_+)|([A-Za-z0-9]+\-+)|([A-Za-z0-9]+\.+)|([A-Za-z0-9]+\++))*[A-Za-z0-9]+@((\w+\-+)|(\w+\.))*\w{1,63}\.[a-zA-Z]{2,6}$";

Validate numeric Inputs with Regular Expressions

 public static bool IsItNumber(string inputvalue)

        {

            Regex isnumber = new Regex("[^0-9]");

            return !isnumber.IsMatch(inputvalue);

        }

Rotate Text in WPF

<TextBlock

        Text="Some Text"

        Grid.Row="8"                                                              

        FontSize="9"                                                       

        Height="25"

        Width="auto"                                                                                                                              

        Grid.Column="2"

        VerticalAlignment="Bottom"

        TextAlignment="Center"

        Margin="5,0,-260,-35">

  <TextBlock.RenderTransform>

<TransformGroup>                                       

 <RotateTransform Angle="-90"/>

       </TransformGroup>                                          

 </TextBlock.RenderTransform>

</TextBlock>

Set Control’s Row Definition at run-time

Control ( Stack Panel ) at Design Time 

<StackPanel   HorizontalAlignment="Right"

              Name="spDate"

              Grid.Row="2"

Grid.Column="1"                 

Orientation="Horizontal">

                                                       

            <Label 

Content="Valid Till :"              FontSize="11"                                                          

Name="lblValidTill"

VerticalAlignment="Center" />

                                                   

<Label Content=""

       FontSize="11"

       HorizontalAlignment="Right"

       Name="lblValidTillPP"

VerticalAlignment="Center"/>                                                       

</StackPanel>

Set Control’s Row Definition at run-time

Grid.SetRow(spDate, 2);

Button with Rounded Corners in WPF

First Created a Style

<Style x:Key="RoundButtonTemplate" TargetType="Button">

        <Setter Property="Background" Value="Brown"/>

        <Setter Property="Foreground" Value="White" />

        <Setter Property="Template">

            <Setter.Value>

                <ControlTemplate TargetType="Button">

                    <Border CornerRadius="15" Background="{TemplateBinding Background}"

                                BorderThickness="1">

                        <ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center">

                        </ContentPresenter>

                    </Border>

                </ControlTemplate>

            </Setter.Value>

        </Setter>

    </Style>

Call the style to Respective Button. 

<Button Focusable="False"

        Style="{StaticResource RoundButtonTemplate}"

        Width="264"

       Height="90" 

       Grid.Row="0"

       Margin="0,0,0,0"

       HorizontalAlignment="Center"

       BorderBrush="#FFF"

       Name="PasswordButton"

       Click="PasswordButton_Click"> 

                                             

</Button>