adding files

Microsoft-Graph-ExcelRest-ToDo.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 14
+VisualStudioVersion = 14.0.24720.0
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Microsoft-Graph-ExcelRest-ToDo", "Microsoft-Graph-ExcelRest-ToDo\Microsoft-Graph-ExcelRest-ToDo.csproj", "{7E86C505-414C-4D01-8DC3-940DCEEFD956}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{7E86C505-414C-4D01-8DC3-940DCEEFD956}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{7E86C505-414C-4D01-8DC3-940DCEEFD956}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{7E86C505-414C-4D01-8DC3-940DCEEFD956}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{7E86C505-414C-4D01-8DC3-940DCEEFD956}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal

Microsoft-Graph-ExcelRest-ToDo/App_Start/BundleConfig.cs

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+using System.Web;
+using System.Web.Optimization;
+
+namespace Microsoft_Graph_ExcelRest_ToDo
+{
+    public class BundleConfig
+    {
+        // For more information on bundling, visit http://go.microsoft.com/fwlink/?LinkId=301862
+        public static void RegisterBundles(BundleCollection bundles)
+        {
+            bundles.Add(new ScriptBundle("~/bundles/jquery").Include(
+                        "~/Scripts/jquery-{version}.js"));
+
+            bundles.Add(new ScriptBundle("~/bundles/jqueryval").Include(
+                        "~/Scripts/jquery.validate*"));
+
+            // Use the development version of Modernizr to develop with and learn from. Then, when you're
+            // ready for production, use the build tool at http://modernizr.com to pick only the tests you need.
+            bundles.Add(new ScriptBundle("~/bundles/modernizr").Include(
+                        "~/Scripts/modernizr-*"));
+
+            bundles.Add(new ScriptBundle("~/bundles/bootstrap").Include(
+                      "~/Scripts/bootstrap.js",
+                      "~/Scripts/respond.js"));
+
+            bundles.Add(new StyleBundle("~/Content/css").Include(
+                      "~/Content/bootstrap.css",
+                      "~/Content/site.css"));
+        }
+    }
+}

Microsoft-Graph-ExcelRest-ToDo/App_Start/FilterConfig.cs

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+using System.Web;
+using System.Web.Mvc;
+
+namespace Microsoft_Graph_ExcelRest_ToDo
+{
+    public class FilterConfig
+    {
+        public static void RegisterGlobalFilters(GlobalFilterCollection filters)
+        {
+            filters.Add(new HandleErrorAttribute());
+        }
+    }
+}

Microsoft-Graph-ExcelRest-ToDo/App_Start/RouteConfig.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Web;
+using System.Web.Mvc;
+using System.Web.Routing;
+
+namespace Microsoft_Graph_ExcelRest_ToDo
+{
+    public class RouteConfig
+    {
+        public static void RegisterRoutes(RouteCollection routes)
+        {
+            routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
+
+            routes.MapRoute(
+                name: "Default",
+                url: "{controller}/{action}/{id}",
+                defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
+            );
+        }
+    }
+}

Microsoft-Graph-ExcelRest-ToDo/Auth/AuthHelper.cs

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+using System.Threading.Tasks;
+using System.Web;
+using Microsoft_Graph_ExcelRest_ToDo.TokenStorage;
+using Microsoft.IdentityModel.Clients.ActiveDirectory;
+using Microsoft.Owin.Security;
+using Microsoft.Owin.Security.OpenIdConnect;
+
+namespace Microsoft_Graph_ExcelRest_ToDo.Auth
+{
+    public class AuthHelper
+    {
+        // This is the logon authority
+        // i.e. https://login.microsoftonline.com/common
+        public string Authority { get; set; }
+        // This is the application ID obtained from registering at
+        // https://apps.dev.microsoft.com
+        public string AppId { get; set; }
+        // This is the application secret obtained from registering at
+        // https://apps.dev.microsoft.com
+        public string AppSecret { get; set; }
+        // This is the token cache
+        public SessionTokenCache TokenCache { get; set; }
+
+        public AuthHelper(string authority, string appId, string appSecret, SessionTokenCache tokenCache)
+        {
+            Authority = authority;
+            AppId = appId;
+            AppSecret = appSecret;
+            TokenCache = tokenCache;
+        }
+
+        public async Task<string> GetUserAccessToken(string redirectUri)
+        {
+            AuthenticationContext authContext = new AuthenticationContext(Authority, false, TokenCache);
+
+            ClientCredential credential = new ClientCredential(AppId, AppSecret);
+
+            try
+            {
+                AuthenticationResult authResult = await authContext.AcquireTokenSilentAsync("https://graph.microsoft.com", credential,
+                  new UserIdentifier(TokenCache.UserObjectId, UserIdentifierType.UniqueId));
+                return authResult.AccessToken;
+            }
+            catch (AdalSilentTokenAcquisitionException)
+            {
+                HttpContext.Current.Request.GetOwinContext().Authentication.Challenge(
+                  new AuthenticationProperties() { RedirectUri = redirectUri },
+                  OpenIdConnectAuthenticationDefaults.AuthenticationType);
+
+                return null;
+            }
+        }
+    }
+}

Microsoft-Graph-ExcelRest-ToDo/Content/Site.css

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+body {
+    padding-top: 50px;
+    padding-bottom: 20px;
+}
+
+/* Set padding to keep content from hitting the edges */
+.body-content {
+    padding-left: 15px;
+    padding-right: 15px;
+}
+
+/* Override the default bootstrap behavior where horizontal description lists 
+   will truncate terms that are too long to fit in the left column 
+*/
+.dl-horizontal dt {
+    white-space: normal;
+}