error MSB3103: Invalid Resx file. Could not load file or assembly 'System.Windows.Forms, ...' or one of its dependencies.

잘 되던 빌드가 어느 날 다음과 같은 오류를 냅니다.

D:\MySrc\Sources\bin>msbuild "..\Test\TestApp.csproj" /property:Platform=AnyCPU;Configuration=Release /t:Rebuild
Microsoft (R) Build Engine version 15.3.409.57025 for .NET Framework
Copyright (C) Microsoft Corporation. All rights reserved.

Build started 2018-03-05 오후 4:08:28.
Project "D:\MySrc\Sources\Test\TestApp.csproj" on node 1 (Rebuild target(s)).
CoreClean:
  Deleting file "D:\MySrc\Sources\Setup\TestApp\obj\Release\TestApp.csprojResolveAssemblyReference.cache".
  Deleting file "D:\MySrc\Sources\Setup\TestApp\obj\Release\TestApp.csproj.GenerateResource.Cache".
CoreResGen:
  "C:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\bin\Resgen.exe" /useSourcePath /r:C:\Windows\Microsoft.NET\Framework\v2.0.50727\CustomMars
  halers.dll /r:D:\MySrc\Sources\Libraries\Microsoft.Web.Administration.dll /r:D:\MySrc\Sources\Libraries\Microsoft.W
  eb.Management.dll /r:C:\Windows\Microsoft.NET\Framework\v2.0.50727\mscorlib.dll /r:C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.Data.dl
  l /r:C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.Deployment.dll /r:C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.DirectoryServi
  ces.dll /r:C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.dll /r:C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.Drawing.dll /r:C:\W
  indows\Microsoft.NET\Framework\v2.0.50727\System.ServiceProcess.dll /r:C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.Windows.Forms.dll /
  r:C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.Xml.dll /compile TestDlg.resx,obj\Release\TestApp.TestDlg.resources
  MainForm.resx,obj\Release\TestApp.MainForm.resources
  Processing resource file "TestDlg.resx" into "obj\Release\TestApp.TestDlg.resources".
D:\MySrc\Sources\Setup\TestApp\TestDlg.resx : error MSB3103: Invalid Resx file. Could not load file or assembly 'Syst
em.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' or one of its dependencies. The handle is invalid. (Exceptio
n from HRESULT: 0x80070006 (E_HANDLE)) [D:\MySrc\Sources\Test\TestApp.csproj]
  Processing resource file "MainForm.resx" into "obj\Release\TestApp.MainForm.resources".
D:\MySrc\Sources\Setup\TestApp\MainForm.resx : error MSB3103: Invalid Resx file. Could not load file or assembly 'System.Wi
ndows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' or one of its dependencies. The handle is invalid. (Exception fro
m HRESULT: 0x80070006 (E_HANDLE)) [D:\MySrc\Sources\Test\TestApp.csproj]
Done Building Project "D:\MySrc\Sources\Test\TestApp.csproj" (Rebuild target(s)) -- FAILED.


Build FAILED.

"D:\MySrc\Sources\Test\TestApp.csproj" (Rebuild target) (1) ->
(CoreResGen target) ->
  D:\MySrc\Sources\Setup\TestApp\TestDlg.resx : error MSB3103: Invalid Resx file. Could not load file or assembly 'Sy
stem.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' or one of its dependencies. The handle is invalid. (Except
ion from HRESULT: 0x80070006 (E_HANDLE)) [D:\MySrc\Sources\Test\TestApp.csproj]
  D:\MySrc\Sources\Setup\TestApp\MainForm.resx : error MSB3103: Invalid Resx file. Could not load file or assembly 'System.
Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' or one of its dependencies. The handle is invalid. (Exception f
rom HRESULT: 0x80070006 (E_HANDLE)) [D:\MySrc\Sources\Test\TestApp.csproj]

    0 Warning(s)
    2 Error(s)

Time Elapsed 00:00:00.96