C# – Cannot find AddMvc() in IServiceCollection in Visual Studio 2017

asp.net-corec

I have created a brand new asp.net core application.
I have added the mvc Nuget package yet I am getting the below error.

Microsoft.AspNetCore.Mvc.Core 1.1.3

'IServiceCollection' does not contain a definition for 'AddMvc' and no extension method 'AddMvc' accepting a first argument of type 'IServiceCollection' could be found (are you missing a using directive or an assembly reference?)**

Best Answer

Install-Package Microsoft.AspNetCore.Mvc -Version 1.1.3

--Update

Unload the project and Reload it again (restart)

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System.Net.Http.Formatting.dll

This can be found in the extensions assemblies area.

A good way of achieving this is by adding the NuGet package Microsoft.AspNet.WebApi.Client to your project.

C# – Build error: You must add a reference to System.Runtime

To implement the fix, first expand out the existing web.config compilation section that looks like this by default:

<compilation debug="true" targetFramework="4.5"/>

Once expanded, I then added the following new configuration XML as I was instructed:

  <assemblies>     
    <add assembly="System.Runtime, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" />   
  </assemblies>

The final web.config tags should look like this:

<compilation debug="true" targetFramework="4.5">
  <assemblies>     
    <add assembly="System.Runtime, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" />   
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</compilation>

Best Answer

Related Solutions

C# – HttpClient not supporting PostAsJsonAsync method C#

C# – Build error: You must add a reference to System.Runtime

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