Mapping custom class to individual ResourceDictionary

See more:

XAML

WPF

DataTemplate

I want to define a DataTemplate of listboxitem in a ResourceDictionary. when mapping I got error.
class is:

namespace DictMainUI.Model
{
    public class SearchListItem:INotifyPropertyChanged
    {
.............
}}

the Mainwindow 's namespace is DictMainUI, but namespace of my custome class is DictMainUI.Model

in ResourceDictionary, when add the last line it shows error, otherwise it is ok. in whole solution there is only one project, so code is:

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"   
                    xmlns:src="clr-namespace:DictMainUI.Model"
                    >

I saw many articles about mapping, but I could not find solution.

please help me , is there anyone know what to do?