Solution for .NET error: The type ‘HttpResponseMessage’ exists in both ‘System.Net.Http, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a’ and ‘System.Net.Http, Version=4.2.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a’

Got this error when building a .NET framework (version 4.6.1) solution containing multiple projects:

The type 'HttpResponseMessage' exists in both 'System.Net.Http, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' and 'System.Net.Http, Version=4.2.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'

My solution:
Install System.Net.Http version 4.0.0 as nuget package to the “failing project”.

Added this to the “failing” project app.config file:

<assemblyBinding>
<!-- other dependentAssembly bindings here -->
<dependentAssembly>
<assemblyIdentity name="System.Net.Http" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-4.2.0.0" newVersion="4.0.0.0" />
</dependentAssembly>
</assemblyBinding>

Updated the “failing” projects .csproj file like this:
Removed this line or similar for System.Net.Http:

<!--<Reference Include="System.Net.Http, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL" />-->

Added “hintpath” with projects relative path to the nuget packages.
In my example its 3 level up and then down (..\..\..) you might need to adjust to your projects folderstructure.

<Reference Include="System.Net.Http, Version=4.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
<HintPath>..\..\..\packages\System.Net.Http.4.0.0\ref\dotnet\System.Net.Http.dll</HintPath>
</Reference>

Voila.

Most Complete MSTest Unit Testing Framework Cheat Sheet

using Microsoft.VisualStudio.TestTools.UnitTesting;
namespace MSTestUnitTests
{
    // A class that contains MSTest unit tests. (Required)
    [TestClass]
    public class YourUnitTests
    {
        [AssemblyInitialize]
        public static void AssemblyInit(TestContext context)
        {
            // Executes once before the test run. (Optional)
        }
        [ClassInitialize]
        public static void TestFixtureSetup(TestContext context)
        { 
           // Executes once for the test class. (Optional)
        }
      
        [TestInitialize]
        public void Setup()
        {
             // Runs before each test. (Optional)
        }
        [AssemblyCleanup]
        public static void AssemblyCleanup()
        {
           // Executes once after the test run. (Optional)
        }
        
        [ClassCleanup]
        public static void TestFixtureTearDown()
        {
            // Runs once after all tests in this class are executed. (Optional)
            // Not guaranteed that it executes instantly after all tests from the class.
        }
        
        [TestCleanup]
        public void TearDown()
        { 
            // Runs after each test. (Optional)
        }
        // Mark that this is a unit test method. (Required)
        [TestMethod]
        public void YouTestMethod()
        {
           // Your test code goes here.
        }
    }
}

 

Source: Most Complete MSTest Unit Testing Framework Cheat Sheet

responsively-app – A modified browser built using Electron that helps in responsive web development.

Website: responsively.app
A modified browser built using Electron that helps in responsive web development.

Features
Mirrored User-interactions across all devices. Customizable preview layout to suit all your needs. One handy elements inspector for all devices in preview. 30+ built-in device profiles with option to add custom devices. One-click screenshot all your devices. Hot reloading supported for developers. Please visit the website to know more about the application – responsively.app
github.com/manojVivek/responsively-app/blob/master/README.md