Add SelfContained project.

SelfContained/Program.cs

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+// This is a simple example application for a self-contained single file.
+
+using System.Diagnostics.CodeAnalysis;
+using Terminal.Gui;
+
+namespace SelfContained;
+
+public static class Program
+{
+    [RequiresUnreferencedCode ("Calls Terminal.Gui.Application.Run<T>(Func<Exception, Boolean>, ConsoleDriver)")]
+    private static void Main (string [] args)
+    {
+        Application.Run<ExampleWindow> ().Dispose ();
+
+        // Before the application exits, reset Terminal.Gui for clean shutdown
+        Application.Shutdown ();
+
+        Console.WriteLine ($@"Username: {ExampleWindow.UserName}");
+    }
+}
+
+// Defines a top-level window with border and title
+public class ExampleWindow : Window
+{
+    public static string? UserName;
+
+    public ExampleWindow ()
+    {
+        Title = $"Example App ({Application.QuitKey} to quit)";
+
+        // Create input components and labels
+        var usernameLabel = new Label { Text = "Username:" };
+
+        var usernameText = new TextField
+        {
+            // Position text field adjacent to the label
+            X = Pos.Right (usernameLabel) + 1,
+
+            // Fill remaining horizontal space
+            Width = Dim.Fill ()
+        };
+
+        var passwordLabel = new Label
+        {
+            Text = "Password:", X = Pos.Left (usernameLabel), Y = Pos.Bottom (usernameLabel) + 1
+        };
+
+        var passwordText = new TextField
+        {
+            Secret = true,
+
+            // align with the text box above
+            X = Pos.Left (usernameText),
+            Y = Pos.Top (passwordLabel),
+            Width = Dim.Fill ()
+        };
+
+        // Create login button
+        var btnLogin = new Button
+        {
+            Text = "Login",
+            Y = Pos.Bottom (passwordLabel) + 1,
+
+            // center the login button horizontally
+            X = Pos.Center (),
+            IsDefault = true
+        };
+
+        // When login button is clicked display a message popup
+        btnLogin.Accept += (s, e) =>
+        {
+            if (usernameText.Text == "admin" && passwordText.Text == "password")
+            {
+                MessageBox.Query ("Logging In", "Login Successful", "Ok");
+                UserName = usernameText.Text;
+                Application.RequestStop ();
+            }
+            else
+            {
+                MessageBox.ErrorQuery ("Logging In", "Incorrect username or password", "Ok");
+            }
+        };
+
+        // Add the views to the Window
+        Add (usernameLabel, usernameText, passwordLabel, passwordText, btnLogin);
+    }
+}

SelfContained/Properties/PublishProfiles/FolderProfile_net8.0_linux-x64.pubxml

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+<?xml version="1.0" encoding="utf-8"?>
+<!--
+https://go.microsoft.com/fwlink/?LinkID=208121.
+-->
+<Project>
+  <PropertyGroup>
+    <Configuration>Release</Configuration>
+    <Platform>Any CPU</Platform>
+    <PublishDir>bin\Release\net8.0\publish\linux-x64\</PublishDir>
+    <PublishProtocol>FileSystem</PublishProtocol>
+    <_TargetId>Folder</_TargetId>
+    <TargetFramework>net8.0</TargetFramework>
+    <RuntimeIdentifier>linux-x64</RuntimeIdentifier>
+    <SelfContained>true</SelfContained>
+  </PropertyGroup>
+</Project>

SelfContained/Properties/PublishProfiles/FolderProfile_net8.0_osx-x64.pubxml

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+<?xml version="1.0" encoding="utf-8"?>
+<!--
+https://go.microsoft.com/fwlink/?LinkID=208121.
+-->
+<Project>
+  <PropertyGroup>
+    <Configuration>Release</Configuration>
+    <Platform>Any CPU</Platform>
+    <PublishDir>bin\Release\net8.0\publish\osx-x64\</PublishDir>
+    <PublishProtocol>FileSystem</PublishProtocol>
+    <_TargetId>Folder</_TargetId>
+    <TargetFramework>net8.0</TargetFramework>
+    <RuntimeIdentifier>osx-x64</RuntimeIdentifier>
+    <SelfContained>true</SelfContained>
+  </PropertyGroup>
+</Project>

SelfContained/Properties/PublishProfiles/FolderProfile_net8.0_win-x64.pubxml

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+<?xml version="1.0" encoding="utf-8"?>
+<!--
+https://go.microsoft.com/fwlink/?LinkID=208121.
+-->
+<Project>
+  <PropertyGroup>
+    <Configuration>Release</Configuration>
+    <Platform>Any CPU</Platform>
+    <PublishDir>bin\Release\net8.0\publish\win-x64\</PublishDir>
+    <PublishProtocol>FileSystem</PublishProtocol>
+    <_TargetId>Folder</_TargetId>
+    <TargetFramework>net8.0</TargetFramework>
+    <RuntimeIdentifier>win-x64</RuntimeIdentifier>
+    <SelfContained>true</SelfContained>
+    <PublishReadyToRun>false</PublishReadyToRun>
+  </PropertyGroup>
+</Project>

SelfContained/SelfContained.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <PublishTrimmed>true</PublishTrimmed>
+    <TrimMode>Link</TrimMode>
+    <PublishSingleFile>true</PublishSingleFile>
+    <InvariantGlobalization>true</InvariantGlobalization>
+	<DebugType>embedded</DebugType>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\Terminal.Gui\Terminal.Gui.csproj" />
+    <TrimmerRootAssembly Include="Terminal.Gui" />
+  </ItemGroup>
+
+</Project>