wpf Xaml :how to expose custome class to DataTemplate

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XAML

WPF

DataTemplate

I have a class which used as DataSource

namespace DictMainUI.Model
{
    class SearchListItem:INotifyPropertyChanged
    {
        private string word;
        private int checkamount;
        ............
        public string Word
        {
            get { return this.word; }
            set
            {
                this.word = value;
                OnPropertyChanged(Word);
            }
        }
        public int CheckAmount
        {
            get { return this.checkamount; }
            set
            {
                if (value < 0)
                {
                    throw new ArgumentException("Price must be positive");
                }
                this.checkamount = value;
                OnPropertyChanged("CheckAmount");
            }
        }
.............

I want to define a datetemplate for ListboxItem that I want to bind to SearchListItem.

I have a ResourceDictionary, I want to define DataTemplate in this resource.

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                   
                    >

so I think I should add namespace to in order to expose SearchListItem attributes to this ResourceDictionary. but once I add it to the resourcedictionary , building project is failed without any message, and when run it, it shows error it says:set output and assembly name correct or something like that .code shown below (which show error as I said)

<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"
                    >

it got wrong when I add DictMainUI.Model namespace to the ResourceDictionary.

I did not know why it dose not work,is there anyone give me a advice on that problem?

thanks in advance!