.Net Framework Aspnet Web Api Project

I create new .net framework MVC project with WEB API.
Add this code In Home Controller
var test1 = new AntiXssEncoder();

Give this error

System.TypeLoadException
Could not resolve type with token 01000011 from typeref (expected class 'System.Web.Security.AntiXss.AntiXssEncoder' in assembly 'System.Web, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a')
Description: HTTP 500.Error processing request.

Details: Non-web exception.

at (wrapper dynamic-method) System.Object.lambda_method(System.Runtime.CompilerServices.Closure,System.Web.Mvc.ControllerBase,object[]) at System.Web.Mvc.ActionMethodDispatcher.Execute (System.Web.Mvc.ControllerBase controller, System.Object[] parameters) [0x00000] in <cc73190bab9d435c831510ff295c572a>:0 at System.Web.Mvc.ReflectedActionDescriptor.Execute (System.Web.Mvc.ControllerContext controllerContext, System.Collections.Generic.IDictionary2[TKey,TValue] parameters) [0x00072] in :0
at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod (System.Web.Mvc.ControllerContext controllerContext, System.Web.Mvc.ActionDescriptor actionDescriptor, System.Collections.Generic.IDictionary2[TKey,TValue] parameters) [0x00000] in <cc73190bab9d435c831510ff295c572a>:0 at System.Web.Mvc.Async.AsyncControllerActionInvoker+ActionInvocation.InvokeSynchronousActionMethod () [0x00000] in <cc73190bab9d435c831510ff295c572a>:0 at System.Web.Mvc.Async.AsyncControllerActionInvoker.<BeginInvokeSynchronousActionMethod>b__39 (System.IAsyncResult asyncResult, System.Web.Mvc.Async.AsyncControllerActionInvoker+ActionInvocation innerInvokeState) [0x00000] in <cc73190bab9d435c831510ff295c572a>:0 at (wrapper delegate-invoke) System.Web.Mvc.Async.EndInvokeDelegate2[System.Web.Mvc.Async.AsyncControllerActionInvoker+ActionInvocation,System.Web.Mvc.ActionResult].invoke_TResult_IAsyncResult_TState(System.IAsyncResult,System.Web.Mvc.Async.AsyncControllerActionInvoker/ActionInvocation)
at System.Web.Mvc.Async.AsyncResultWrapper+WrappedAsyncResult2[TResult,TState].CallEndDelegate (System.IAsyncResult asyncResult) [0x00000] in <cc73190bab9d435c831510ff295c572a>:0 at System.Web.Mvc.Async.AsyncResultWrapper+WrappedAsyncResultBase1[TResult].End () [0x00029] in :0
at System.Web.Mvc.Async.AsyncResultWrapper.End[TResult] (System.IAsyncResult asyncResult, System.Object tag) [0x00007] in :0
at System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod (System.IAsyncResult asyncResult) [0x00000] in :0
at System.Web.Mvc.Async.AsyncControllerActionInvoker+AsyncInvocationWithFilters.b__3d () [0x00014] in :0
at System.Web.Mvc.Async.AsyncControllerActionInvoker+AsyncInvocationWithFilters+<>c__DisplayClass46.b__3f () [0x00086] in :0
at System.Web.Mvc.Async.AsyncControllerActionInvoker+<>c__DisplayClass33.b__32 (System.IAsyncResult asyncResult) [0x00000] in :0
at System.Web.Mvc.Async.AsyncResultWrapper+WrappedAsyncResult1[TResult].CallEndDelegate (System.IAsyncResult asyncResult) [0x00000] in <cc73190bab9d435c831510ff295c572a>:0 at System.Web.Mvc.Async.AsyncResultWrapper+WrappedAsyncResultBase1[TResult].End () [0x00029] in :0
at System.Web.Mvc.Async.AsyncResultWrapper.End[TResult] (System.IAsyncResult asyncResult, System.Object tag) [0x00007] in :0
at System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters (System.IAsyncResult asyncResult) [0x00000] in :0
at System.Web.Mvc.Async.AsyncControllerActionInvoker+<>c__DisplayClass21+<>c__DisplayClass2b.b__1c () [0x00000] in :0
at System.Web.Mvc.Async.AsyncControllerActionInvoker+<>c__DisplayClass21.b__1e (System.IAsyncResult asyncResult) [0x00041] in :0
at System.Web.Mvc.Async.AsyncResultWrapper+WrappedAsyncResult1[TResult].CallEndDelegate (System.IAsyncResult asyncResult) [0x00000] in <cc73190bab9d435c831510ff295c572a>:0 at System.Web.Mvc.Async.AsyncResultWrapper+WrappedAsyncResultBase1[TResult].End () [0x00029] in :0
at System.Web.Mvc.Async.AsyncResultWrapper.End[TResult] (System.IAsyncResult asyncResult, System.Object tag) [0x00007] in :0
at System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction (System.IAsyncResult asyncResult) [0x00000] in :0
at System.Web.Mvc.Controller.b__1d (System.IAsyncResult asyncResult, System.Web.Mvc.Controller+ExecuteCoreState innerState) [0x00000] in :0
at (wrapper delegate-invoke) System.Web.Mvc.Async.EndInvokeVoidDelegate1[System.Web.Mvc.Controller+ExecuteCoreState].invoke_void_IAsyncResult_TState(System.IAsyncResult,System.Web.Mvc.Controller/ExecuteCoreState) at System.Web.Mvc.Async.AsyncResultWrapper+WrappedAsyncVoid1[TState].CallEndDelegate (System.IAsyncResult asyncResult) [0x00000] in :0
at System.Web.Mvc.Async.AsyncResultWrapper+WrappedAsyncResultBase1[TResult].End () [0x00029] in <cc73190bab9d435c831510ff295c572a>:0 at System.Web.Mvc.Async.AsyncResultWrapper.End[TResult] (System.IAsyncResult asyncResult, System.Object tag) [0x00007] in <cc73190bab9d435c831510ff295c572a>:0 at System.Web.Mvc.Async.AsyncResultWrapper.End (System.IAsyncResult asyncResult, System.Object tag) [0x00000] in <cc73190bab9d435c831510ff295c572a>:0 at System.Web.Mvc.Controller.EndExecuteCore (System.IAsyncResult asyncResult) [0x00000] in <cc73190bab9d435c831510ff295c572a>:0 at System.Web.Mvc.Controller.<BeginExecute>b__15 (System.IAsyncResult asyncResult, System.Web.Mvc.Controller controller) [0x00000] in <cc73190bab9d435c831510ff295c572a>:0 at System.Web.Mvc.Async.AsyncResultWrapper+WrappedAsyncVoid1[TState].CallEndDelegate (System.IAsyncResult asyncResult) [0x00000] in :0
at System.Web.Mvc.Async.AsyncResultWrapper+WrappedAsyncResultBase1[TResult].End () [0x00029] in <cc73190bab9d435c831510ff295c572a>:0 at System.Web.Mvc.Async.AsyncResultWrapper.End[TResult] (System.IAsyncResult asyncResult, System.Object tag) [0x00007] in <cc73190bab9d435c831510ff295c572a>:0 at System.Web.Mvc.Async.AsyncResultWrapper.End (System.IAsyncResult asyncResult, System.Object tag) [0x00000] in <cc73190bab9d435c831510ff295c572a>:0 at System.Web.Mvc.Controller.EndExecute (System.IAsyncResult asyncResult) [0x00000] in <cc73190bab9d435c831510ff295c572a>:0 at System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.EndExecute (System.IAsyncResult asyncResult) [0x00000] in <cc73190bab9d435c831510ff295c572a>:0 at System.Web.Mvc.MvcHandler.<BeginProcessRequest>b__5 (System.IAsyncResult asyncResult, System.Web.Mvc.MvcHandler+ProcessRequestState innerState) [0x00000] in <cc73190bab9d435c831510ff295c572a>:0 at (wrapper delegate-invoke) System.Web.Mvc.Async.EndInvokeVoidDelegate1[System.Web.Mvc.MvcHandler+ProcessRequestState].invoke_void_IAsyncResult_TState(System.IAsyncResult,System.Web.Mvc.MvcHandler/ProcessRequestState)
at System.Web.Mvc.Async.AsyncResultWrapper+WrappedAsyncVoid1[TState].CallEndDelegate (System.IAsyncResult asyncResult) [0x00000] in <cc73190bab9d435c831510ff295c572a>:0 at System.Web.Mvc.Async.AsyncResultWrapper+WrappedAsyncResultBase1[TResult].End () [0x00029] in :0
at System.Web.Mvc.Async.AsyncResultWrapper.End[TResult] (System.IAsyncResult asyncResult, System.Object tag) [0x00007] in :0
at System.Web.Mvc.Async.AsyncResultWrapper.End (System.IAsyncResult asyncResult, System.Object tag) [0x00000] in :0
at System.Web.Mvc.MvcHandler.EndProcessRequest (System.IAsyncResult asyncResult) [0x00000] in :0
at System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest (System.IAsyncResult result) [0x00000] in :0
at System.Web.HttpApplication.async_handler_complete_cb (System.IAsyncResult ar) [0x00015] in /Users/builder/jenkins/workspace/build-package-osx-mono/2018-08/external/bockbuild/builds/mono-x64/mcs/class/System.Web/System.Web/HttpApplication.cs:988 `
When i transfer to Visual Studio Mac i take this error

Could not resolve type with token 010000eb from typeref (expected class 'System.Web.Security.AntiXss.AntiXssEncoder' in assembly 'System.Web,

On which platforms did you notice this

[ ] macOS