Consider using Code First Migrations to update the database

行 112:        {
行 113:            this.DataContext.Configuration.ProxyCreationEnabled = true;
行 114:            var value = dbset.Where(where).ToList();
行 115:            this.DataContext.Configuration.ProxyCreationEnabled = false;
行 116:            return value;

[InvalidOperationException: The model backing the 'DataContext' context has changed since the database was created. Consider using Code First Migrations to update the database (http://go.microsoft.com/fwlink/?LinkId=238269).]
   System.Data.Entity.CreateDatabaseIfNotExists`1.InitializeDatabase(TContext context) +350
   System.Data.Entity.Internal.<>c__DisplayClass8.<PerformDatabaseInitialization>b__6() +59
   System.Data.Entity.Internal.InternalContext.PerformInitializationAction(Action action) +117
   System.Data.Entity.Internal.InternalContext.PerformDatabaseInitialization() +279
   System.Data.Entity.Internal.LazyInternalContext.<InitializeDatabase>b__4(InternalContext c) +31
   System.Data.Entity.Internal.RetryAction`1.PerformAction(TInput input) +147
   System.Data.Entity.Internal.LazyInternalContext.InitializeDatabaseAction(Action`1 action) +276
   System.Data.Entity.Internal.LazyInternalContext.InitializeDatabase() +112
   System.Data.Entity.Internal.InternalContext.Initialize() +42
   System.Data.Entity.Internal.InternalContext.GetEntitySetAndBaseTypeForType(Type entityType) +34
   System.Data.Entity.Internal.Linq.InternalSet`1.Initialize() +124
   System.Data.Entity.Internal.Linq.InternalSet`1.GetEnumerator() +33
   System.Data.Entity.Infrastructure.DbQuery`1.System.Collections.Generic.IEnumerable<TResult>.GetEnumerator() +91
   System.Linq.WhereEnumerableIterator`1.MoveNext() +63
   System.Collections.Generic.List`1..ctor(IEnumerable`1 collection) +327
   System.Linq.Enumerable.ToList(IEnumerable`1 source) +58
   TopWin.Etone.Infrastructure.Framework.RepositoryBase`1.GetMany(Func`2 where) in E:\aspnet2.0\yunyou2\Yunyou_N\TopWin.Etone.Infrastructure\Framework\RepositoryBase.cs:114
   TopWin.Etone.Data.UserRepository.FindByUserName(String UserName) in E:\aspnet2.0\yunyou2\Yunyou_N\TopWin.Etone.Data\Infrastructure\UserRepository.cs:32
   TopWin.Etone.Web.Controllers.AccountController.Login(LoginModel LoginModel) in E:\aspnet2.0\yunyou2\Yunyou_N\TopWin.Etone.Web\Controllers\AccountController.cs:57
   lambda_method(Closure , ControllerBase , Object[] ) +107
   System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters) +17
   System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) +208
   System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +27
   System.Web.Mvc.<>c__DisplayClass15.<InvokeActionMethodWithFilters>b__12() +55
   System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) +263
   System.Web.Mvc.<>c__DisplayClass17.<InvokeActionMethodWithFilters>b__14() +19
   System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodWithFilters(ControllerContext controllerContext, IList`1 filters, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +191
   System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) +343
   System.Web.Mvc.Controller.ExecuteCore() +116
   System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext) +97
   System.Web.Mvc.ControllerBase.System.Web.Mvc.IController.Execute(RequestContext requestContext) +10
   System.Web.Mvc.<>c__DisplayClassb.<BeginProcessRequest>b__5() +37
   System.Web.Mvc.Async.<>c__DisplayClass1.<MakeVoidDelegate>b__0() +21
   System.Web.Mvc.Async.<>c__DisplayClass8`1.<BeginSynchronous>b__7(IAsyncResult _) +12
   System.Web.Mvc.Async.WrappedAsyncResult`1.End() +62
   System.Web.Mvc.<>c__DisplayClasse.<EndProcessRequest>b__d() +50
   System.Web.Mvc.SecurityUtil.<GetCallInAppTrustThunk>b__0(Action f) +7
   System.Web.Mvc.SecurityUtil.ProcessInApplicationTrust(Action action) +22
   System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +60
   System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +9
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +8970349
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +184