ASP.NET

<customErrors mode="On">
  <error statusCode="404" redirect="~/Error/Page404" />
  <error statusCode="500" redirect="~/Error/Page500" />
</customErrors>

void Application_Error(object sender, EventArgs e)
        {
            if (HttpContext.Current.IsDebuggingEnabled)
            {
                // Pick up the Exception Error
                HttpException httpException = new HttpException();
                RouteData routeData = new RouteData();

                // Get our current controller and action
                string controller = Request.RequestContext.RouteData.Values["controller"].ToString();
                string action = Request.RequestContext.RouteData.Values["action"].ToString();

                //We clear the response
                Response.Clear();
                Server.ClearError();

                // Validate the this controller is legit

                // If the controller exist, use it, or else use the error controller
                if (controller != null)
                    routeData.Values.Add("controller", controller);
                else
                    routeData.Values.Add("controller", "Error");

                // A good location for any error logging, otherwise, do it inside of the error controller.

                //We check if we have an AJAX request and return JSON in this case
                if (IsAjaxRequest())
                {
                    Response.Write("Your JSON here");
                }
                else
                {
                    if (httpException != null)
                    {
                        int httpCode = httpException.GetHttpCode();
                        switch (httpCode)
                        {
                            case 500:
                                Response.StatusCode = 404;
                                Response.ContentType = "text/html";
                                routeData.Values.Add("action", "Page500");

                                // Clear the error, otherwise, we will always get the default error page.
                                Server.ClearError();
                                break;

                            case 404:
                                Response.StatusCode = 404;
                                Response.ContentType = "text/html";
                                routeData.Values.Add("action", "Page404");

                                // Clear the error, otherwise, we will always get the default error page.
                                Server.ClearError();
                                break;

                            default:
                                Response.StatusCode = 404;
                                Response.ContentType = "text/html";
                                routeData.Values.Add("action", "Page404");

                                // Clear the error, otherwise, we will always get the default error page.
                                Server.ClearError();
                                break;
                        }

                        // We can pass the exception to the Action as well, something like
                        // routeData.Values.Add("error", exception);                        

                        // Call the controller with the route
                        IController errorController = new coastEnviromental.Controllers.ErrorController();
                        try
                        {
                            Response.TrySkipIisCustomErrors = true;
                            errorController.Execute(new RequestContext(new HttpContextWrapper(Context), routeData));
                        }
                        catch (Exception ex)
                        {
                            Console.WriteLine(ex.ToString());
                            Response.Redirect("Error");
                        }
                    }
                }                

            }
        }

public class ErrorController : Controller
    {
        public ActionResult Index()
        {
            return View();
            return View("Page404", "Error"); // Also tried
        }

        public ActionResult Page404()
        {
            return View();
        }

        public ActionResult Page500()
        {
            return View();
        }
    }

0 info it worked if it ends with ok
1 verbose cli [ 'C:\\Program Files\\nodejs\\node.exe',
1 verbose cli   'C:\\Users\\aaleem01\\AppData\\Roaming\\npm\\node_modules\\npm\\bin\\npm-cli.js',
1 verbose cli   'start' ]
2 info using npm@4.4.4
3 info using node@v6.10.1
4 verbose run-script [ 'prestart', 'start', 'poststart' ]
5 info lifecycle webapplication@0.0.0~prestart: webapplication@0.0.0
6 silly lifecycle webapplication@0.0.0~prestart: no script for prestart, continuing
7 info lifecycle webapplication@0.0.0~start: webapplication@0.0.0
8 verbose lifecycle webapplication@0.0.0~start: unsafe-perm in lifecycle true
9 verbose lifecycle webapplication@0.0.0~start: PATH: C:\Users\aaleem01\AppData\Roaming\npm\node_modules\npm\bin\node-gyp-bin;C:\Users\aaleem01\Desktop\Angular2Apps\dotnetcoreapp\node_modules\.bin;C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE\CommonExtensions\Microsoft\TestWindow;C:\Program Files (x86)\Microsoft SDKs\F#\4.0\Framework\v4.0\;C:\Program Files (x86)\MSBuild\14.0\bin;C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE\;C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\BIN;C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\Tools;C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319;C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\VCPackages;C:\Program Files (x86)\HTML Help Workshop;C:\Program Files (x86)\Microsoft Visual Studio 14.0\Team Tools\Performance Tools;C:\Program Files (x86)\Windows Kits\10\bin\x86;C:\Program Files (x86)\Microsoft SDKs\Windows\v10.0A\bin\NETFX 4.6.1 Tools\;C:\ProgramData\Oracle\Java\javapath;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\Program Files (x86)\Enterprise Vault\EVClient\;C:\Program Files\ServiceNow;C:\Program Files (x86)\WebEx\Productivity Tools;C:\Program Files\Intel\WiFi\bin\;C:\Program Files\Common Files\Intel\WirelessCommon\;C:\WINDOWS\system32\config\systemprofile\.dnx\bin;C:\Program Files\Microsoft DNX\Dnvm\;C:\Program Files\Microsoft SQL Server\120\Tools\Binn\;C:\Program Files\Microsoft SQL Server\130\Tools\Binn\;C:\Program Files (x86)\nodejs\;C:\Program Files (x86)\Windows Kits\10\Windows Performance Toolkit\;C:\Program Files\TortoiseSVN\bin;C:\Program Files (x86)\Microsoft SQL Server\110\Tools\Binn\ManagementStudio\;C:\Program Files (x86)\Microsoft SQL Server\110\Tools\Binn\;C:\Program Files (x86)\Microsoft SQL Server\110\DTS\Binn\;C:\Program Files\Git\cmd;C:\Program Files (x86)\Microsoft Visual Studio 11.0\Common7\IDE\PrivateAssemblies\;C:\Program Files (x86)\GitExtensions\;C:\Program Files\Microsoft SQL Server\110\DTS\Binn\;C:\Program Files\Microsoft SQL Server\110\Tools\Binn\;C:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\IDE\PrivateAssemblies\;C:\Program Files (x86)\Microsoft SQL Server\120\Tools\Binn\ManagementStudio\;C:\Program Files (x86)\Microsoft SQL Server\120\Tools\Binn\;C:\Program Files (x86)\Microsoft Visual Studio 12.0\Common7\IDE\PrivateAssemblies\;C:\Program Files (x86)\Microsoft SQL Server\120\DTS\Binn\;C:\Program Files (x86)\Microsoft SQL Server\130\DTS\Binn\;C:\Program Files (x86)\Symantec\VIP Access Client\;C:\Program Files\dotnet\;C:\Program Files\ServiceNow;C:\Program Files\nodejs\;C:\Users\aaleem01\.dnx\bin;.bin;C:\Program Files (x86)\Microsoft VS Code\bin;C:\Users\aaleem01\AppData\Roaming\npm
10 verbose lifecycle webapplication@0.0.0~start: CWD: C:\Users\aaleem01\Desktop\Angular2Apps\dotnetcoreapp
11 silly lifecycle webapplication@0.0.0~start: Args: [ '/d /s /c',
11 silly lifecycle   'tsc && concurrently "npm run tsc:w" "npm run lite" ' ]
12 silly lifecycle webapplication@0.0.0~start: Returned: code: 2  signal: null
13 info lifecycle webapplication@0.0.0~start: Failed to exec start script
14 verbose stack Error: webapplication@0.0.0 start: `tsc && concurrently "npm run tsc:w" "npm run lite" `
14 verbose stack Exit status 2
14 verbose stack     at EventEmitter.<anonymous> (C:\Users\aaleem01\AppData\Roaming\npm\node_modules\npm\lib\utils\lifecycle.js:279:16)
14 verbose stack     at emitTwo (events.js:106:13)
14 verbose stack     at EventEmitter.emit (events.js:191:7)
14 verbose stack     at ChildProcess.<anonymous> (C:\Users\aaleem01\AppData\Roaming\npm\node_modules\npm\lib\utils\spawn.js:40:14)
14 verbose stack     at emitTwo (events.js:106:13)
14 verbose stack     at ChildProcess.emit (events.js:191:7)
14 verbose stack     at maybeClose (internal/child_process.js:886:16)
14 verbose stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:226:5)
15 verbose pkgid webapplication@0.0.0
16 verbose cwd C:\Users\aaleem01\Desktop\Angular2Apps\dotnetcoreapp
17 verbose Windows_NT 6.1.7601
18 verbose argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Users\\aaleem01\\AppData\\Roaming\\npm\\node_modules\\npm\\bin\\npm-cli.js" "start"
19 verbose node v6.10.1
20 verbose npm  v4.4.4
21 error code ELIFECYCLE
22 error errno 2
23 error webapplication@0.0.0 start: `tsc && concurrently "npm run tsc:w" "npm run lite" `
23 error Exit status 2
24 error Failed at the webapplication@0.0.0 start script 'tsc && concurrently "npm run tsc:w" "npm run lite" '.
24 error Make sure you have the latest version of node.js and npm installed.
24 error If you do, this is most likely a problem with the webapplication package,
24 error not with npm itself.
24 error Tell the author that this fails on your system:
24 error     tsc && concurrently "npm run tsc:w" "npm run lite"
24 error You can get information on how to open an issue for this project with:
24 error     npm bugs webapplication
24 error Or if that isn't available, you can get their info via:
24 error     npm owner ls webapplication
24 error There is likely additional logging output above.
25 verbose exit [ 2, true ]

public class RaceDayDisplayController : ApiControllerWithHub<RaceDayDisplayHub>
    {
        [HttpPost]
        [Route("api/DoSomething")]
        public HttpResponseMessage DoSomething(Rootobject model)
        {
            Hub.Clients.All.LastSectional(model.sectionTimes[0].runners);
        }
    }

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>Display</title>
</head>
<body>
    <h2>Real-Time Raceday Data</h2>

    <table id="showData"></table>

    <!--Script references. -->
    <!--Reference the Angular library. -->
    <script src="/Scripts/angular.js"></script>
    <!--Reference the jQuery library. -->
    <script src="/Scripts/jquery-1.10.2.min.js"></script>
    <!--Reference the SignalR library. -->
    <script src="/Scripts/jquery.signalR-2.1.2.js"></script>
    <!--Reference the autogenerated SignalR hub script. -->
    <script src="/signalr/hubs"></script>

    <script type="text/javascript">

        $(function () {
            var myHub = $.connection.raceDayDisplayHub;

            try {
                $.connection.hub.start();

                myHub.on('LastSectional', function (runners) {

                    $("#showData tr").remove();
                    $('#showData').append('<tr><td width="150">Pos</td><td width="210">Name</td><td width="150">Margin</td><td width="150">Last Sectional</td><td width="150">Cumulative Times</td></tr>');
                    for (var i = 0; i < runners.length; i++) {
                        $('#showData').append('<tr><td>' + runners[i].position + '</td><td>' + runners[i].bookNumber + ' ' + runners[i].name + '</td><td>' + runners[i].margin + '</td><td>' + runners[i].sTime + '</td><td>' + runners[i].cumTime + '</td></tr>');
                    }

                    //var runners = JSON.stringify(test)

                    //var app = angular.module('myApp', []);
                    //app.controller('customersCtrl', function ($scope) {
                    //    $scope.runners = runners;
                    //});
                });

            } catch (e) {
                alert(e.message);
            }

        });

    </script>

</body>
</html>

Private Sub BindListView()
        Dim constr As String = ConfigurationManager.ConnectionStrings("Tokens4UDissertationSite").ConnectionString
        Using con As New SqlConnection(constr)
            Using cmd As New SqlCommand()
                cmd.CommandText = "SELECT ProductID, ProductName, ProductDescription, ProdImage, CustomerID, Cost FROM Product ORDER BY ProductID DESC"
                cmd.Connection = con
                Using sda As New SqlDataAdapter(cmd)
                    Dim dt As New DataTable()
                    sda.Fill(dt)
                    ListView2.DataSource = dt
                    ListView2.DataBind()
                End Using
            End Using
        End Using
    End Sub