MIssing method in System.Web.Http.ApiController.get_Request()

I have a controller.

 public sealed class AccountsController : BaseApiController { private readonly IDatabaseAdapter _databaseAdapter; public AccountsController(IDatabaseAdapter databaseAdapter) { _databaseAdapter = databaseAdapter; } [AllowAnonymous] [Route("create")] public async Task<IHttpActionResult> CreateUser(CreateUserBindingModel createUserModel) { if (!ModelState.IsValid) return BadRequest(ModelState); if (! await _databaseAdapter.DoesAgentExist(createUserModel.UserName)) return BadRequest(); if (await _databaseAdapter.DoesAgentHaveAccount(createUserModel.UserName)) return BadRequest(); // Create account. var password = PasswordHelper.GeneratePassword(32); createUserModel.Password = password; createUserModel.ConfirmPassword = password; var user = new ApplicationUser { UserName = createUserModel.UserName, }; var addUserResult = await AppUserManager.CreateAsync(user, createUserModel.Password); if (!addUserResult.Succeeded) return GetErrorResult(addUserResult); var locationHeader = new Uri(Url.Link("GetUserById", new { id = user.Id })); return Created(locationHeader, ModelFactory.Create(user)); } } 

When I send the following fiddler to the create method.

http://localhost:59430/api/accounts/create User-Agent: Fiddler

Content-Type: application/json Accept: application/json Host: localhost:59430 Content-Length: 106

{ "UserName":"a.xxxxx", "Password":"xxxxxx", "ConfirmPassword":"xxxxxx", }

It gets down to the following line:

var addUserResult = await AppUserManager.CreateAsync(user, createUserModel.Password);

Then the following exception occurs

{ "message": "An error has occurred.", "exceptionMessage": "Method not found: 'System.Net.Http.HttpRequestMessage System.Web.Http.ApiController.get_Request()'.", "exceptionType": "System.MissingMethodException", "stackTrace": " at WebAuth.Controllers.BaseApiController.get_AppUserManager()\r\n at WebAuth.Controllers.AccountsController.d__3.MoveNext() in C:\Users\stuarts\Documents\Visual Studio 2017\Projects\WebAuth\WebAuth\Controllers\AccountsController.cs:line 76\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Threading.Tasks.TaskHelpersExtensions.d__3`1.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Web.Http.Controllers.ApiControllerActionInvoker.d__0.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Web.Http.Controllers.ActionFilterResult.d__2.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Web.Http.Dispatcher.HttpControllerDispatcher.d__1.MoveNext()" }

Anyone know what is going on? I have no idea why it can't find that method.

My bin folders contains

System.Web.Http.dll System.Web.Http.Owin.dll System.Net.Http.dll

ApplicationUserManager

public sealed class ApplicationUserManager : UserManager<ApplicationUser> { public ApplicationUserManager(IUserStore<ApplicationUser> store) : base(store) { } public static ApplicationUserManager Create(IdentityFactoryOptions<ApplicationUserManager> options, IOwinContext context) { var appDbContext = context.Get<ApplicationDbContext>(); var appUserManager = new ApplicationUserManager(new UserStore<ApplicationUser>(appDbContext)); appUserManager.UserValidator = new UserValidator<ApplicationUser>(appUserManager) { AllowOnlyAlphanumericUserNames = true, RequireUniqueEmail = false, }; appUserManager.PasswordValidator = new PasswordValidator { RequiredLength = 12, RequireNonLetterOrDigit = true, RequireUppercase = true, RequireLowercase = true, RequireDigit = true }; appUserManager.MaxFailedAccessAttemptsBeforeLockout = 3; appUserManager.DefaultAccountLockoutTimeSpan = TimeSpan.FromHours(1); return appUserManager; } } 

BaseApiController

public class BaseApiController : ApiController { private ModelFactory _modelFactory; private readonly ApplicationUserManager _applicationUserManager = null; protected ApplicationUserManager AppUserManager => _applicationUserManager ?? Request.GetOwinContext().GetUserManager<ApplicationUserManager>(); protected ModelFactory ModelFactory => _modelFactory ?? (_modelFactory = new ModelFactory(Request, AppUserManager)); protected IHttpActionResult GetErrorResult(IdentityResult result) { if (result == null) return InternalServerError(); if (result.Succeeded) return null; if (result.Errors != null) foreach (var error in result.Errors) ModelState.AddModelError(string.Empty, error); if (ModelState.IsValid) return BadRequest(); return BadRequest(ModelState); } private readonly ApplicationRoleManager _appRoleManager = null; protected ApplicationRoleManager AppRoleManager => _appRoleManager ?? Request.GetOwinContext().GetUserManager<ApplicationRoleManager>(); }