UnathorizedException Error?

Question

Hi Team

 

I am writing a back end application in C# using Azure SDK to the portal, but the exception im getting is as follow;

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.Azure.Devices.Client;
using Microsoft.Azure.Devices.Common;
using Microsoft.Azure.Devices.Shared;
using Microsoft.Azure.Devices;
namespace BackEndApplication
{
class Program
{
private static ServiceClient _serviceClient;
private readonly static string s_connectionString = "HostName=UniversityIOTHub.azure-devices.net;DeviceId=UniversityDeviceIOT;SharedAccessKey=U433bDviQRc4QlxyZSO+9sZ1d6fY94CJg2AMh+bF78g=";
private static async Task InvokeMethod()
{
var methodInvocation = new CloudToDeviceMethod("SetTelemetryInterval") { ResponseTimeout = TimeSpan.FromSeconds(30) };
methodInvocation.SetPayloadJson("10");
var response = await _serviceClient.InvokeDeviceMethodAsync("UniversityDeviceIOT", methodInvocation);
Console.WriteLine("Response status:{0}, payload", response.Status);
Console.WriteLine(response.GetPayloadAsJson());
}
static void Main(string[] args)
{
Console.WriteLine("IOT Hub Test-- BackEndApplication.\n");
_serviceClient = ServiceClient.CreateFromConnectionString(s_connectionString);
InvokeMethod().GetAwaiter().GetResult();
Console.WriteLine("Press Enter to exit.");
Console.ReadLine();
}
}
}

Microsoft.Azure.Devices.Common.Exceptions.UnauthorizedException

HResult=0x80131500

Message={"Message":"{\"errorCode\":401002,\"trackingId\":\"56456d99a904426686d7547826371c50-G:2-TimeStamp:09/12/2019 06:54:47\",\"message\":\"Unauthorized\",\"timestampUtc\":\"2019-09-12T06:54:47.6295403Z\"}","ExceptionMessage":""}

Source=Microsoft.Azure.Devices

StackTrace:

at Microsoft.Azure.Devices.HttpClientHelper.<ExecuteAsync>d__36.MoveNext()

at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)

at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

at Microsoft.Azure.Devices.HttpClientHelper.<PostAsync>d__27`2.MoveNext()

at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)

at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()

at BackEndApplication.Program.<InvokeMethod>d__2.MoveNext() in C:\Users\Gcobanim\source\repos\BackEndApplication\Program.cs:line 25

at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)

at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

at System.Runtime.CompilerServices.TaskAwaiter.GetResult()

at BackEndApplication.Program.Main(String[] args) in C:\Users\Gcobanim\source\repos\BackEndApplication\Program.cs:line 36