inheriting from a Base page in WPF

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WPF

inheritance

I have some code that I keep repeating in different code behind pages in my WPF Pages. I want to have a BasePage to inherit them from in order to simplify the process of adding these functions in. I have created a base class called MMMBasePage which is just as C# class that inherits from Page. In the code behind I have replace the first with the second.

public partial class Home : Page

public partial class Home : MMSBasePage

In the XAML I seem to be doing something wrong but as far as I can tell I did it correctly.

<src:MMSBasePage x:Class="MMS.Home"
      xmlns:src="clr-namespace:MMS"
      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" 
      xmlns:uc="clr-namespace:MMS.UserControls"
      xmlns:filter="clr-namespace:DataGridFilterLibrary;assembly=DataGridFilterLibrary"
      mc:Ignorable="d" 
      d:DesignHeight="600" d:DesignWidth="1000"
      Title="Home" Loaded="Page_Loaded">

After a build it starts with the error

"A property 'Title' does not exist in XML namespace 'clr-namespace:MMS'. Line 12 Position 7.