Server Error in '/' Application.

The current request for action 'Upload' on controller type 'ImageGalleryController' is ambiguous between the following action methods:
System.Web.Mvc.ActionResult Upload() on type MvcImageUpload.Controllers.ImageGalleryController
System.Web.Mvc.ActionResult Upload(MvcImageUpload.ImageGallery) on type MvcImageUpload.Controllers.ImageGalleryController

Exception Details: System.Reflection.AmbiguousMatchException: The current request for action 'Upload' on controller type 'ImageGalleryController' is ambiguous between the following action methods:
System.Web.Mvc.ActionResult Upload() on type MvcImageUpload.Controllers.ImageGalleryController
System.Web.Mvc.ActionResult Upload(MvcImageUpload.ImageGallery) on type MvcImageUpload.Controllers.ImageGalleryController

Stack Trace: 

[AmbiguousMatchException: The current request for action 'Upload' on controller type 'ImageGalleryController' is ambiguous between the following action methods:
System.Web.Mvc.ActionResult Upload() on type MvcImageUpload.Controllers.ImageGalleryController
System.Web.Mvc.ActionResult Upload(MvcImageUpload.ImageGallery) on type MvcImageUpload.Controllers.ImageGalleryController]
   System.Web.Mvc.Async.AsyncActionMethodSelector.FindAction(ControllerContext controllerContext, String actionName) +276
   System.Web.Mvc.Async.ReflectedAsyncControllerDescriptor.FindAction(ControllerContext controllerContext, String actionName) +181
   System.Web.Mvc.ControllerActionInvoker.FindAction(ControllerContext controllerContext, ControllerDescriptor controllerDescriptor, String actionName) +52
   System.Web.Mvc.Async.AsyncControllerActionInvoker.BeginInvokeAction(ControllerContext controllerContext, String actionName, AsyncCallback callback, Object state) +295
   System.Web.Mvc.<>c__DisplayClass1d.<BeginExecuteCore>b__17(AsyncCallback asyncCallback, Object asyncState) +83
   System.Web.Mvc.Async.WrappedAsyncResult`1.Begin(AsyncCallback callback, Object state, Int32 timeout) +161
   System.Web.Mvc.Async.AsyncResultWrapper.Begin(AsyncCallback callback, Object state, BeginInvokeDelegate beginDelegate, EndInvokeDelegate`1 endDelegate, Object tag, Int32 timeout) +92
   System.Web.Mvc.Async.AsyncResultWrapper.Begin(AsyncCallback callback, Object state, BeginInvokeDelegate beginDelegate, EndInvokeDelegate endDelegate, Object tag, Int32 timeout) +97
   System.Web.Mvc.Async.AsyncResultWrapper.Begin(AsyncCallback callback, Object state, BeginInvokeDelegate beginDelegate, EndInvokeDelegate endDelegate, Object tag) +53
   System.Web.Mvc.Controller.BeginExecuteCore(AsyncCallback callback, Object state) +501
   System.Web.Mvc.Async.WrappedAsyncResult`1.Begin(AsyncCallback callback, Object state, Int32 timeout) +161
   System.Web.Mvc.Async.AsyncResultWrapper.Begin(AsyncCallback callback, Object state, BeginInvokeDelegate beginDelegate, EndInvokeDelegate`1 endDelegate, Object tag, Int32 timeout) +92
   System.Web.Mvc.Async.AsyncResultWrapper.Begin(AsyncCallback callback, Object state, BeginInvokeDelegate beginDelegate, EndInvokeDelegate endDelegate, Object tag, Int32 timeout) +97
   System.Web.Mvc.Async.AsyncResultWrapper.Begin(AsyncCallback callback, Object state, BeginInvokeDelegate beginDelegate, EndInvokeDelegate endDelegate, Object tag) +53
   System.Web.Mvc.Controller.BeginExecute(RequestContext requestContext, AsyncCallback callback, Object state) +417
   System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.BeginExecute(RequestContext requestContext, AsyncCallback callback, Object state) +49
   System.Web.Mvc.<>c__DisplayClass8.<BeginProcessRequest>b__2(AsyncCallback asyncCallback, Object asyncState) +127
   System.Web.Mvc.Async.WrappedAsyncResult`1.Begin(AsyncCallback callback, Object state, Int32 timeout) +161
   System.Web.Mvc.Async.AsyncResultWrapper.Begin(AsyncCallback callback, Object state, BeginInvokeDelegate beginDelegate, EndInvokeDelegate`1 endDelegate, Object tag, Int32 timeout) +92
   System.Web.Mvc.Async.AsyncResultWrapper.Begin(AsyncCallback callback, Object state, BeginInvokeDelegate beginDelegate, EndInvokeDelegate endDelegate, Object tag, Int32 timeout) +97
   System.Web.Mvc.Async.AsyncResultWrapper.Begin(AsyncCallback callback, Object state, BeginInvokeDelegate beginDelegate, EndInvokeDelegate endDelegate, Object tag) +53
   System.Web.Mvc.MvcHandler.BeginProcessRequest(HttpContextBase httpContext, AsyncCallback callback, Object state) +373
   System.Web.Mvc.MvcHandler.BeginProcessRequest(HttpContext httpContext, AsyncCallback callback, Object state) +88
   System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.BeginProcessRequest(HttpContext context, AsyncCallback cb, Object extraData) +50
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +103
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +155

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace MvcImageUpload.Controllers
{
    public class ImageGalleryController : Controller
    {
        //
        // GET: /ImageGallery/

        public ActionResult Index()
        {
            return View();
        }

      
 
            public ActionResult Gallery()
            {
                List<ImageGallery> all = new List<ImageGallery>();

                // Here MyDatabaseEntities is our datacontext
                using ( ImgUpEntities dc = new ImgUpEntities ())
                {
                    all = dc.ImageGalleries.ToList();
                }
                return View(all);
            }
            public ActionResult Upload()
            {
                return View();
            }

            public ActionResult Upload(ImageGallery IG)
            {
                // Apply Validation Here


                if (IG.File.ContentLength > (2 * 1024 * 1024))
                {
                    ModelState.AddModelError("CustomError", "File size must be less than 2 MB");
                    return View();
                }
                if (!(IG.File.ContentType == "image/jpeg" || IG.File.ContentType == "image/gif"))
                {
                    ModelState.AddModelError("CustomError", "File type allowed : jpeg and gif");
                    return View();
                }

                IG.FileName = IG.File.FileName;
                IG.ImageSize = IG.File.ContentLength;

                byte[] data = new byte[IG.File.ContentLength];
                IG.File.InputStream.Read(data, 0, IG.File.ContentLength);

                IG.ImageData = data;
                using (ImgUpEntities dc = new ImgUpEntities())
                {
                    dc.ImageGalleries.Add(IG);
                    dc.SaveChanges();
                }
                return RedirectToAction("Gallery");
            }
        }
        
    }