i just added the refrence of `Microsoft.VisualStudio.TestTools.UITesting` in my project and i try to use the ImageComparer` class but i get an error when running this

```
 private void Form1_Load(object sender, EventArgs e)
    {
        Image a = Image.FromFile(@"C:\Users\itapi\Desktop\a.png");
        Image b = Image.FromFile(@"C:\Users\itapi\Desktop\b.png");
        ImageComparer.Compare(a,b);
    }

```

the error is 

> 
> An unhandled exception of type 'System.TypeInitializationException'
>  occurred in Microsoft.VisualStudio.TestTools.UITesting.dll
> 
> 
> Additional information: The type initializer for
>  'Microsoft.VisualStudio.TestTools.UITest.Extension.UITestUtilities'
>  threw an exception.
> 
> 
> 

does anyone has any idea what's wrong here?

this is the innter excpetion 

> 
> System.TypeInitializationException: The type initializer for
>  'Microsoft.VisualStudio.TestTools.UITest.Extension.UITestUtilities'
>  threw an exception. ---> System.IO.FileNotFoundException: Could not
>  load file or assembly
>  'Microsoft.VisualStudio.TestTools.UITest.WindowsStoreUtility,
>  Version=12.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or
>  one of its dependencies. The system cannot find the file specified.  
> 
>  at
>  Microsoft.VisualStudio.TestTools.UITest.Extension.UITestUtilities..cctor()
>  --- End of inner exception stack trace --- at Microsoft.VisualStudio.TestTools.UITest.Extension.UITestUtilities.CheckForNull(Object
>  parameter, String parameterName) at
>  Microsoft.VisualStudio.TestTools.UITesting.ImageComparer.CompareInternal(Image
>  actualImage, Image expectedImage, ColorDifference argbTolerance,
>  Image& diffImage, Boolean createOutImage) at
>  Microsoft.VisualStudio.TestTools.UITesting.ImageComparer.Compare(Image
>  actualImage, Image expectedImage, ColorDifference argbTolerance) at
>  Microsoft.VisualStudio.TestTools.UITesting.ImageComparer.Compare(Image
>  actualImage, Image expectedImage) at
>  WindowsFormsApplication4.Form1.Form1\_Load(Object sender, EventArgs e)
>  in c:\Users\itapi\OneDrive\??????\Visual Studio
>  2013\Projects\WindowsFormsApplication4\WindowsFormsApplication4\Form1.cs:line
>  30 
> 
> 
>