I've been trying to fix this error for awhile now.

I get this error any time my application tries to create an instance of my data context.

Below is the code:

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Web;
    using RandomRentals.Models;
    using System.Data.Entity;

    namespace RandomRentals.Models
    {
        public class RentalContext : DbContext
        {
            public DbSet<Rental> Rentals { get; set; }
            public DbSet<Category> Categories { get; set; }
            public DbSet<Item> Items { get; set; }
            public DbSet<Billing> Billings { get; set; }
            public DbSet<User> Users { get; set; }
            public DbSet<Video> Videos { get; set; }
            public DbSet<Picture> Pictures { get; set; }
            public DbSet<ServiceType> ServiceTypes { get; set; }
            public DbSet<Rating> Ratings { get; set; }
            public DbSet<Business>  Businesses { get; set; }
            public DbSet<BusinessHour> BusinessHours { get; set; }  
        }
    }

Here is the stack Trace:

[InvalidOperationException: The type 'RandomRentals.Rental' was not mapped. Check that the type has not been explicitly excluded by using the Ignore method or NotMappedAttribute data annotation. Verify that the type was defined as a class, is not primitive, nested or generic, and does not inherit from EntityObject.]
   System.Data.Entity.Internal.DbSetDiscoveryService.GetSets() +706
   System.Data.Entity.Internal.DbSetDiscoveryService.InitializeSets() +31
   System.Data.Entity.DbContext.DiscoverAndInitializeSets() +56
   System.Data.Entity.DbContext.InitializeLazyInternalContext(IInternalConnection internalConnection, DbCompiledModel model) +79
   System.Data.Entity.DbContext..ctor() +99
   RandomRentals.Models.RentalContext..ctor() +44
   RandomRentals.Models.UserModel..ctor() in C:\Users\nikka\Desktop\RandomRentals\RandomRentals\Models\UserModel.cs:11

[TargetInvocationException: Exception has been thrown by the target of an invocation.]
   System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor, Boolean& bNeedSecurityCheck) +0
   System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache) +98
   System.RuntimeType.CreateInstanceDefaultCtor(Boolean publicOnly, Boolean skipVisibilityChecks, Boolean skipCheckThis, Boolean fillCache) +241
   System.Activator.CreateInstance(Type type, Boolean nonPublic) +69
   System.Web.Mvc.DefaultModelBinder.CreateModel(ControllerContext controllerContext, ModelBindingContext bindingContext, Type modelType) +199
   System.Web.Mvc.DefaultModelBinder.BindComplexModel(ControllerContext controllerContext, ModelBindingContext bindingContext) +572
   System.Web.Mvc.DefaultModelBinder.BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext) +449
   System.Web.Mvc.ControllerActionInvoker.GetParameterValue(ControllerContext controllerContext, ParameterDescriptor parameterDescriptor) +317
   System.Web.Mvc.ControllerActionInvoker.GetParameterValues(ControllerContext controllerContext, ActionDescriptor actionDescriptor) +117
   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() +8970061
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +184

Here is the full error text:

The type 'RandomRentals.Rental' was not mapped. Check that the type has not been explicitly excluded by using the Ignore method or NotMappedAttribute data annotation. Verify that the type was defined as a class, is not primitive, nested or generic, and does not inherit from EntityObject.

Any help would be greatly appreciated