XAML设计器System.TypeLoadException

Question

I almost getting crazy, because getting message from XAML designer and do not know what to do

As you can see on the line

Could not load type 'Mocks.Libraries_Collection_Classes_Storages_0_229157595

there is a class called Storages in the Libraries.Collection namespace. When I remove the reference Libraries.Collection from current project like:

Then the xaml designer is working

And when I add the Libraries.Collection library again: and open the XAML Designer, then the error appears again:

The class storages class looks like:

using System.Collections.Generic;
using System.Collections.ObjectModel;

namespace Libraries.Collection.Classes
{
    public class Storages : ObservableCollection<Storage>
    {
        public Storages()
        {
        }

        public Storages(IEnumerable<Storage> coll) : base(coll)
        {
        }
    }
}

What am I doing wrong? I am using VS2015. Update I used fuslogvw.exe for record logs and the output looks as follow:

*** Assembly Binder Log Entry  (12/8/2015 @ 8:05:42 AM) ***

The operation failed.
Bind result: hr = 0x80070002. The system cannot find the file specified.

Assembly manager loaded from:  C:\Windows\Microsoft.NET\Framework\v4.0.30319\clr.dll
Running under executable  C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE\XDesProc.exe
--- A detailed error log follows. 

=== Pre-bind state information ===
LOG: DisplayName = XamlDesignerFaultInjection
 (Partial)
WRN: Partial binding information was supplied for an assembly:
WRN: Assembly Name: XamlDesignerFaultInjection | Domain ID: 1
WRN: A partial bind occurs when only part of the assembly display name is provided.
WRN: This might result in the binder loading an incorrect assembly.
WRN: It is recommended to provide a fully specified textual identity for the assembly,
WRN: that consists of the simple name, version, culture, and public key token.
WRN: See whitepaper http://go.microsoft.com/fwlink/?LinkId=109270 for more information and common solutions to this issue.
LOG: Appbase = file:///C:/Program Files (x86)/Microsoft Visual Studio 14.0/Common7/IDE/
LOG: Initial PrivatePath = NULL
LOG: Dynamic Base = NULL
LOG: Cache Base = NULL
LOG: AppName = XDesProc.exe
Calling assembly : Microsoft.VisualStudio.DesignTools.Utility, Version=14.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a.
===
LOG: This bind starts in default load context.
LOG: Using application configuration file: C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE\XDesProc.exe.Config
LOG: Using host configuration file: 
LOG: Using machine configuration file from C:\Windows\Microsoft.NET\Framework\v4.0.30319\config\machine.config.
LOG: Policy not being applied to reference at this time (private, custom, partial, or location-based assembly bind).
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio 14.0/Common7/IDE/XamlDesignerFaultInjection.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio 14.0/Common7/IDE/XamlDesignerFaultInjection/XamlDesignerFaultInjection.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio 14.0/Common7/IDE/PublicAssemblies/XamlDesignerFaultInjection.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio 14.0/Common7/IDE/PublicAssemblies/XamlDesignerFaultInjection/XamlDesignerFaultInjection.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio 14.0/Common7/IDE/PrivateAssemblies/XamlDesignerFaultInjection.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio 14.0/Common7/IDE/PrivateAssemblies/XamlDesignerFaultInjection/XamlDesignerFaultInjection.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio 14.0/Common7/IDE/XamlDesignerFaultInjection.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio 14.0/Common7/IDE/XamlDesignerFaultInjection/XamlDesignerFaultInjection.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio 14.0/Common7/IDE/PublicAssemblies/XamlDesignerFaultInjection.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio 14.0/Common7/IDE/PublicAssemblies/XamlDesignerFaultInjection/XamlDesignerFaultInjection.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio 14.0/Common7/IDE/PrivateAssemblies/XamlDesignerFaultInjection.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio 14.0/Common7/IDE/PrivateAssemblies/XamlDesignerFaultInjection/XamlDesignerFaultInjection.EXE.
LOG: All probing URLs attempted and failed.

The problem is the xaml designer. What should I do as next step?

Answer 1

After double reading your question I have edited this answer.
In an older VS versions I faced this similar exception once, but with the difference that it was at runtime. In my case it end up being that a version of the assembly was already in the GAC. For determining the cause I used Fuslogvw tool , it could be your best change for you right now to see what is going on in your box.