C#

<pre>        <StackPanel Margin="1,1,1,1" Grid.ColumnSpan="3">
            <StackPanel Name="Panel1" Height="26">
                <Label HorizontalContentAlignment="Center" VerticalContentAlignment="Center" Content="Menu_1" Foreground="White" FontWeight="Bold" MouseLeftButtonUp="Panel1_MouseLeftButtonUp">
                    <Label.Background>
                        <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
                            <GradientStop Color="#FF80CEF3" Offset="0.01"/>
                            <GradientStop Color="#FF5588A0" Offset="1"/>
                        </LinearGradientBrush>
                    </Label.Background>
                </Label>
                <StackPanel.Triggers>
                    <EventTrigger RoutedEvent="UIElement.MouseLeftButtonUp">
                        <BeginStoryboard >
                            <Storyboard x:Name="Animation1">
                                <DoubleAnimation Storyboard.TargetName="Panel1" Storyboard.TargetProperty="Height" To="646" Duration="0:0:0.50" AccelerationRatio="0.6" DecelerationRatio="0.4" />
                                <DoubleAnimation Storyboard.TargetName="Panel2" Storyboard.TargetProperty="Height" To="26" Duration="0:0:0.50" AccelerationRatio="0.6" DecelerationRatio="0.4" />
                             </Storyboard>
                        </BeginStoryboard>
                    </EventTrigger>
                </StackPanel.Triggers>
            </StackPanel>
            <StackPanel Name="Panel2" Height="26">
                <Label HorizontalContentAlignment="Center" VerticalContentAlignment="Center" Content="Menu_2" Foreground="White" FontWeight="Bold">
                    <Label.Background>
                        <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
                            <GradientStop Color="#FF80CEF3" Offset="0.01"/>
                            <GradientStop Color="#FF5588A0" Offset="1"/>
                        </LinearGradientBrush>
                    </Label.Background>
                </Label>
                <StackPanel.Triggers>
                    <EventTrigger RoutedEvent="UIElement.MouseLeftButtonUp">
                        <BeginStoryboard>
                            <Storyboard x:Name="menu">
                                <DoubleAnimation x:Name="Menu_1" Storyboard.TargetName="Panel1" Storyboard.TargetProperty="Height" To="26" Duration="0:0:0.50" AccelerationRatio="0.6" DecelerationRatio="0.4" />
                                <DoubleAnimation x:Name="Menu_2" Storyboard.TargetName="Panel2" Storyboard.TargetProperty="Height" To="646" Duration="0:0:0.50" AccelerationRatio="0.6" DecelerationRatio="0.4" />
                           </Storyboard>
                        </BeginStoryboard>
                    </EventTrigger>
                </StackPanel.Triggers>
            </StackPanel>
        </StackPanel>

private void Panel1_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
      {

         DoubleAnimation oMenuAnimation = new DoubleAnimation();

          oMenuAnimation.From = 26;
          oMenuAnimation.To =646;
          oMenuAnimation.Duration = new Duration(new TimeSpan(0, 0, 0, 500));
          oMenuAnimation.AccelerationRatio = .6;
          oMenuAnimation.DecelerationRatio = .4;
          Storyboard s = new Storyboard();
          Storyboard.SetTargetProperty(oMenuAnimation, new PropertyPath("Height"));
          Storyboard.SetTarget(oMenuAnimation,Panel1);
          Storyboard.SetTargetName(oMenuAnimation, "Panel1");
          s.Children.Add(oMenuAnimation);


          DoubleAnimation oMenuAnimation2 = new DoubleAnimation();


          oMenuAnimation2.To = 26;
          oMenuAnimation2.Duration = new Duration(new TimeSpan(0, 0, 0, 500));
          oMenuAnimation2.AccelerationRatio = .6;
          oMenuAnimation2.DecelerationRatio = .4;

          Storyboard.SetTargetProperty(oMenuAnimation2, new PropertyPath("Height"));
          Storyboard.SetTarget(oMenuAnimation2, Panel2);

          s.Children.Add(oMenuAnimation2);



          s.Begin();

      }

Process p = Process.Start(@"C:\Program Files (x86)\Notepad++\notepad++.exe");
        p.WaitForInputIdle();
        IntPtr h = p.MainWindowHandle;
        SetForegroundWindow(h);
        IntPtr child = FindWindowEx(h, new IntPtr(0), "Scintilla", null);
        SendMessageW(child, 0x000C, 0, "Test \n test2");

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private void Doit_T(IEnumerable<string> T) {...}
private void Doit_R(IEnumerable<int> R) {...}
private void Doit_C(IEnumerable<int> C) {...}
private void Doit_TR(IEnumerable<string,int> TR) {...}
private void Doit_TC(IEnumerable<string,int> TC) {...}
private void Doit_RC(IEnumerable<int,int> RC) {...}
private void Doit_None() {...}

private void Doit(IEnumerable<string> T) {...}
private void Doit(IEnumerable<int> R_or_C) {...}
private void Doit(IEnumerable<string,int> TR_or_TC) {...}
private void Doit(IEnumerable<int,int> R_and_C) {...}
private void Doit() {...}

public class Name
{
    public Name(string first = null, string middle = null, string last = null)
    {
        FirstName = first;
        MiddleName  = middle;
        LastName = last;
    }
    
    public String FirstName { set; get; }
    public String MiddleName { set; get; }
    public String LastName { set; get; }

    // return type is value tuple
    public (string first, string middle, string last) FullName
    {
        set
        {
            FirstName = value.first;
            MiddleName = value.middle;
            LastName = value.last;
        }
        
        get { return (first: FirstName, middle: MiddleName, last: LastName); }
    }
}

Name nametest1 = new Name(first: "john", last: "doe");

var fullname1 = nametest1.FullName; // return value is value tuple

string lastname1 = fullname1.last;

Name nametest2 = new Name();

nametest2.FullName = ("judy","a.", "doe"); // setting value using value tuple

var fullname2 = nametest2.FullName;

string lastname2 = fullname2.last;