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CanvasUrlBuilder urlBuilder = new CanvasUrlBuilder(httpContext.Request, canvasSettings);
var url = urlBuilder.GetLoginUrl(this.FacebookApp, Perms, ReturnUrlPath, CancelUrlPath);

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        public void Application_Start()
        {
            FacebookContext.SetApplication(new RequestScopedFacebookApplication());
        }


        private class RequestScopedFacebookApplication : IFacebookApplication
        {

            private IFacebookApplication Current

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  <system.webServer>
    <httpProtocol>
      <customHeaders>
        <clear />
        <add name="X-UA-Compatible" value="IE=9; chrome=1" />
      </customHeaders>
    </httpProtocol>
  </system.webServer>

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    public class MvcApplication : System.Web.HttpApplication
    {
        protected void Application_Start()
        {
            // Register your multi-tenant application on app startup
            FacebookApplication.SetApplication(new MultiTenantFacebookApplication());
        }
    }

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namespace System.Web.Mvc {
    using System;
    using System.Collections.Generic;
    using System.Globalization;
    using System.Runtime.CompilerServices;
    using System.Text;
    using System.Web;
    using System.Web.WebPages.Html;
    using Microsoft.Internal.Web.Utils;

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namespace System.Web.Mvc {
    using System.Runtime.CompilerServices;

    [TypeForwardedFrom("System.Web.Mvc, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35")]
    public enum TagRenderMode {
        Normal,
        StartTag,
        EndTag,
        SelfClosing
    }

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    [Export]
    [PartCreationPolicy(CreationPolicy.NonShared)]
    public class AccountController : Controller
    {

        const string appId = "188070564565375";
        const string appSecret = "<app_secret>";

        // **************************************
        // URL: /Account/LogOn

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public class CachedLocationService : LocationService
    {
        private static List<StoreLocation> locations;
        private static DateTime expireTime = DateTime.UtcNow;
        private static object syncLock = new object();

        public CachedLocationService(DataModelContainer dataModelContainer)
            : base(dataModelContainer) { }

        public override StoreLocation GetByStoreNumber(int storeNumber)

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dynamic data = CanvasContext.Current.SignedRequest.Data
if (data.page.liked) {
 // has liked
} else {
 // Not liked
}

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public class FacebookLogger {

        private static readonly FacebookLogger Instance = new FacebookLogger();

        /// <summary>
        /// Gets the current Facebook logger.
        /// </summary>
        public static IFacebookLogger Current
        {
            get