WPFでWindowとかUserControlエレメントでStaticResourceを呼ぶとエラーになった ref: http://qiita.com/yu_ka1984/items/e77c4c03375435bf613c

file0.cs

    public class MainVM : BindableBase
    {
        private string _Title;
        public string Titile
        {
            get { return _Title; }
            set { SetProperty(ref _Title, value); }
        }

        private bool _IsVisible;
        public bool IsVisible
        {
            get { return _IsVisible; }
            set { SetProperty(ref _IsVisible, value); }
        }

    }

file1.xml

<Window x:Class="WpfApplication1.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:WpfApplication1"
        mc:Ignorable="d"
        Height="350" Width="525" 
        Title="{Binding Title}" 
        Visibility="{Binding Path=IsVisible,Converter={StaticResource bvConv}}">
    <Window.Resources>
        <BooleanToVisibilityConverter x:Key="bvConv" />
    </Window.Resources>
    <Grid>

    </Grid>
</Window>

file2.xml

<Window x:Class="WpfApplication1.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:WpfApplication1"
        mc:Ignorable="d"
        Height="350" Width="525" 
        Title="{Binding Title}">
    <Window.Resources>
        <BooleanToVisibilityConverter x:Key="bvConv" />
    </Window.Resources>
    <Window.Style>
        <Style TargetType="{x:Type Window}">
            <Setter Property="Visibility" Value="{Binding Path=IsVisible,Converter={StaticResource bvConv}}" />
        </Style>
    </Window.Style>
    <Grid>

    </Grid>
</Window>