help me to solve this issue:

Severity Code Project File Description Line Suppression State

Error CS$0815$ Library Management System$($LMS$)$ C:$\backslash$Users$\backslash$bksgh$\backslash$Source$\backslash$Repos$\backslash$b$7$bks$\backslash$Assignment$\backslash$Library Management System$\backslash$Controllers$\backslash$AccountController$.$cs Cannot assign void to an implicitly$-$typed variable $91$ N$/$A

my full code:

using Microsoft.AspNet.Identity;

using Microsoft.AspNet.Identity.Owin;

using Microsoft.Owin.Security;

using System.Threading.Tasks;

using System.Web;

using System.Web.Mvc;

using Library$\_$Management$\_$System.Models;

namespace Library$\_$Management$\_$System.Controllers

$\{$

$[$Authorize$]$

public class AccountController : Controller

$\{$

private ApplicationSignInManager $\_$signInManager;

private ApplicationUserManager $\_$userManager;

public AccountController$()$

$\{$

$\}$

public AccountController$($ApplicationUserManager userManager, ApplicationSignInManager signInManager$)$

$\{$

UserManager $=$ userManager;

SignInManager $=$ signInManager;

$\}$

public ApplicationSignInManager SignInManager

$\{$

get $\{$ return $\_$signInManager $??$ HttpContext.GetOwinContext$().$Get$()$; $\}$

private set $\{\_$signInManager $=$ value; $\}$

$\}$

public ApplicationUserManager UserManager

$\{$

get $\{$ return $\_$userManager $??$ HttpContext.GetOwinContext$().$GetUserManager$()$; $\}$

private set $\{\_$userManager $=$ value; $\}$

$\}$

$//$ GET: $/$Account$/$Login

$[$AllowAnonymous$]$

public ActionResult Login$($string returnUrl$)$

$\{$

ViewBag.ReturnUrl $=$ returnUrl;

return View$()$;

$\}$

$//$ POST: $/$Account$/$Login

$[$HttpPost$]$

$[$AllowAnonymous$]$

$[$ValidateAntiForgeryToken$]$

public async Task Login$($LoginViewModel model, string returnUrl$)$

$\{$

if $(!$ModelState.IsValid$)$

$\{$

return View$($model$)$;

$\}$

var result $=$ await SignInManager.PasswordSignInAsync$($model$.$Email, model.Password, model.RememberMe, shouldLockout: false$)$;

switch $($result$)$

$\{$

case SignInStatus.Success:

return RedirectToLocal$($returnUrl$)$;

case SignInStatus.LockedOut:

return View$("$Lockout$")$;

case SignInStatus.RequiresVerification:

return RedirectToAction$("$SendCode$",$ new $\{$ ReturnUrl $=$ returnUrl, RememberMe $=$ model.RememberMe $\})$;

case SignInStatus.Failure:

default:

ModelState.AddModelError$("",$ "Invalid login attempt."$)$;

return View$($model$)$;

$\}$

$\}$

$//$ GET: $/$Account$/$Register

$[$AllowAnonymous$]$

public ActionResult Register$()$

$\{$

return View$()$;

$\}$

$//$ POST: $/$Account$/$Register

$[$HttpPost$]$

$[$AllowAnonymous$]$

$[$ValidateAntiForgeryToken$]$

public async Task Register$($RegisterViewModel model$)$

$\{$

if $($ModelState$.$IsValid$)$

$\{$

var user $=$ new ApplicationUser $\{$ UserName $=$ model.Email, Email $=$ model.Email $\}$;

var createUserResult $=$ await UserManager.CreateAsync$($user$,$ model.Password$)$;

if $($createUserResult$.$Succeeded$)$

$\{$

await SignInManager.SignInAsync$($user$,$ isPersistent: false, rememberBrowser: false$)$;

return RedirectToAction$("$Index$",$ "Home"$)$;

$\}$

AddErrors$($createUserResult$)$;

$\}$

$//$ If we got this far, something failed, redisplay the form

return View$($model$)$;

$\}$

$//$ POST: $/$Account$/$LogOff

$[$HttpPost$]$

$[$ValidateAntiForgeryToken$]$

public ActionResult LogOff$()$

$\{$

AuthenticationManager.SignOut$($DefaultAuthenticationTypes$.$ApplicationCookie$)$;

return RedirectToAction$("$Index$",$ "Home"$)$;

$\}$

$//...$ Rest of your AccountController actions $...$

private ActionResult RedirectToLocal$($string returnUrl$)$

$\{$

if $($Url$.$IsLocalUrl$($returnUrl$))$

$\{$

return Redirect$($returnUrl$)$;

$\}$

else

$\{$

return RedirectToAction$("$Index$",$ "Home"$)$;

$\}$

$\}$

private void AddErrors$($IdentityResult result$)$

$\{$

foreach $($var error in result.Errors$)$

$\{$

ModelState.AddModelError$("",$ error$)$;

$\}$

$\}$

private IAuthenticationManager AuthenticationManager

$\{$

get

$\{$

return HttpContext.GetOwinContext$().$Authentication;

$\}$

$\}$

$\}$

$\}$