CS0103: The name 'Styles' does not exist in the current context

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Step. 1- Install the fallowing Using Nuget
              Microsoft.AspNet.Web.Optimization

Step. 2- Install the fallowing Using App_Start/BundleConfig.cs

public static void RegisterBundles(BundleCollection bundles)

        {

            bundles.Add(new ScriptBundle("~/bundles/jquery").Include(

                        "~/Scripts/jquery-{version}.js"));

            bundles.Add(new ScriptBundle("~/bundles/jqueryui").Include(

                        "~/Scripts/jquery-ui-{version}.js"));

            bundles.Add(new ScriptBundle("~/bundles/jqueryval").Include(

                      "~/Scripts/jquery.unobtrusive-ajax.js",

                      "~/Scripts/jquery.validate.js",

                       "~/Scripts/jquery.validate.unobtrusive.js",

                        "~/Commons_JS/Common.js"

                      ));

           

            bundles.Add(new ScriptBundle("~/bundles/modernizr").Include(

                        "~/Scripts/modernizr-*"));

            bundles.Add(new ScriptBundle("~/bundles/JS").Include(

                             "~/js/jquery-3.2.1.min.js",

                             "~/js/popper.min.js",

                             "~/js/bootstrap.min.js",

                             "~/js/main.js",

                             "~/js/plugins/pace.min.js"

                         ));

            bundles.Add(new StyleBundle("~/bootstrap/css").Include(

                      "~/css/bootstrap.min.css",

                      ));

        }

Step. 3-  Add the following line to your Global.asax.cs
          
            BundleConfig.RegisterBundles(BundleTable.Bundles);


Step. 4-  Add the following line to your View/web.config file
             

<system.web.webPages.razor>

    <host factoryType="System.Web.Mvc.MvcWebRazorHostFactory, System.Web.Mvc, Version=5.2.3.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />

    <pages pageBaseType="System.Web.Mvc.WebViewPage">

      <namespaces>

        <add namespace="System.Web.Optimization"/>

      </namespaces>

    </pages>

  </system.web.webPages.razor>

Step. 5-  Add the following line to your web.config file

<runtime>

    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">     

        <assemblyIdentity name="System.Web.Optimization" publicKeyToken="31bf3856ad364e35" />

        <bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="1.1.0.0" />

      </dependentAssembly>

    </assemblyBinding>

  </runtime>