TestContext warning cs1684

Question

I create a new "Windows Metro style" Unit Test Library project. I compile it and I get no warnings.

I then modify the test class to include:

public TestContext TestContext {get;set;}

Then, I re-compile. After that I always get two warnings:

1>c:\Program Files (x86)\Microsoft SDKs\Windows\v8.0\ExtensionSDKs\MSTestFramework\11.0\References\CommonConfiguration\neutral\Microsoft.VisualStudio.QualityTools.UnitTestFramework.dll : warning CS1684: Reference to type 'System.Collections.IDictionary' claims it is defined in 'c:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETCore\v4.5\mscorlib.dll', but it could not be found

1>c:\Program Files (x86)\Microsoft SDKs\Windows\v8.0\ExtensionSDKs\MSTestFramework\11.0\References\CommonConfiguration\neutral\Microsoft.VisualStudio.QualityTools.UnitTestFramework.dll : warning CS1684: Reference to type 'System.Collections.IDictionary' claims it is defined in 'c:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETCore\v4.5\mscorlib.dll', but it could not be found

How do I get rid of these warnings?

Answer 1

Hello Michael,

Do you reference the mscorlib.dll in your test project? If so, which mscorlib.dll you add in your test project? Is the one in the path C:\Windows\assembly\GAC_32\mscorlib\2.0.0.0__b77a5c561934e089\ or the one in the path c:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETCore\v4.5\?

I suspect you are using the c:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETCore\v4.5\mscorlib.dll in your test project. However, I am sorry to say that you can't find the 'System.Collections.IDictionary' type in the c:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETCore\v4.5\mscorlib.dll. Instead you can find it in the  C:\Windows\assembly\GAC_32\mscorlib\2.0.0.0__b77a5c561934e089\mscorlib.dll. So I am afraid you need to re-add your reference.

Thanks. 

---

Vicky Song [MSFT]
MSDN Community Support | Feedback to us

Answer 2

I didn't add any references. The references to the project are:

• .NET for Metro style apps
• MSTestFramewor
• TestPlantform
• Windows

These are the exact steps I followed.

1. Open Visual studio with no solutions.
2. Create a new project. Select Visual C# -> Windows Metro Style -> Blank Application
3. Accept all defaults, press OK.
4. Right click on the solution to add a project.
5. Selected Visual C# -> Windows Metro Style -> Unit Test Library
6. Kept the defaults, and pressed OK.
7. Build solution - no errors or warnings.
8. Added the TestContext property to the UnitTest1 class (final code below).
9. Build solution – warnings are present.

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using Microsoft.VisualStudio.TestTools.UnitTesting;

namespace UnitTestProject1

{

    [TestClass]

    public class UnitTest1

    {

        public TestContext TestContext { get; set; }

        [TestMethod]

        public void TestMethod1()

        {

        }

    }

}

Answer 3

Hello Michael,

Thanks for providing me the detailed steps, and I can reproduce it. I am sorry that I can't figure you the root cause of your issue. Maybe you can consider submitting one feedback on the Microsoft Connect site here:

https://connect.microsoft.com/VisualStudio/feedback/CreateFeedback.aspx 

Thanks.

---

Vicky Song [MSFT]
MSDN Community Support | Feedback to us

Answer 4

Thanks Vicky,

The problem was posted on Microsoft Connect at:
https://connect.microsoft.com/VisualStudio/feedback/details/750518/targetexception-error-in-binding-to-dictionary-string-object