Caliburn.Micro – Hello World

App.xaml

<Application x:Class="HelloWorld.App"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:local="clr-namespace:HelloWorld">
  <Application.Resources>
    <ResourceDictionary>
      <ResourceDictionary.MergedDictionaries>
        <ResourceDictionary>
          <local:HelloWorldBootStrapper x:Key="bootstrapper" />
        </ResourceDictionary>
      </ResourceDictionary.MergedDictionaries>
    </ResourceDictionary>
  </Application.Resources>
</Application>

HelloWorldBootStrapper.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Caliburn.Micro;
using HelloWorld.ViewModels;

namespace HelloWorld
{
  public class HelloWorldBootStrapper : Bootstrapper<MainViewModel>
  {
  }
}

MainView.xaml

<UserControl x:Class="HelloWorld.Views.MainView"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             mc:Ignorable="d"
             d:DesignHeight="300" d:DesignWidth="500">
  <StackPanel>
    <StackPanel Orientation="Horizontal">
      <TextBlock Text="Name: " />
      <TextBox x:Name="Name" />
    </StackPanel>
    <TextBlock x:Name="HelloString"/>
    <Button x:Name="SayHello" Content="Click Me"/>
  </StackPanel>
</UserControl>

MainViewModel.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Caliburn.Micro;

namespace HelloWorld.ViewModels
{
  public class MainViewModel : PropertyChangedBase  
  {
    private string _name;
    private string _helloString;
    
    public string Name
    {
      get { return _name; }
      set
      {
        _name = value;
        NotifyOfPropertyChange(() => Name);
        NotifyOfPropertyChange(() => CanSayHello);
      }
    }

    public string HelloString
    {
      get { return _helloString; }
      private set
      {
        _helloString = value;
        NotifyOfPropertyChange(() => HelloString);
      }
    }

    public bool CanSayHello
    {
      get { return !string.IsNullOrWhiteSpace(Name); }
    }  

    public void SayHello(string name)
    {
      HelloString = string.Format("Hello {0}.", Name);
    }
  }
}

you application does not works
Severity Code Description Project File Line Suppression State
Error The name "HelloWorldBootStrapper" does not exist in the namespace "clr-namespace:HelloWorld".