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Activator.CreateInstance picks up old referenced dll. Not working properly

I am trying to instantiate a class from DemoClass.dll using Activator.CreateInstance(type.Assembly.FullName, type.FullName)
This class implements the one interface from other dll. Lets say DemoInterfaces.dll. Earlier it was supposed to implement two methods. But now we have only one method i.e. one is removed. However, while instantiating it is trying to reference old copy which I don't see anywhere. It is the new dll and also checked it in dotpeek. The DemoInterfaces.dll interface has only one method.
Below is the sample code.
Assembly assembly = Assembly.LoadFrom(path);
Type type = assembly.GetType("className", true, true);
var xxx = Activator.CreateInstance(type.Assembly.FullName, type.FullName);
However, it is looking the implementation of second method. So Method implementation in class from DemoClass.dll is not found.
{"Exception has been thrown by the target of an invocation."}
Data: {System.Collections.ListDictionaryInternal}
HResult: -2146232828
HelpLink: null
InnerException: {"Method not found: ''xxxx"}
Message: "Exception has been thrown by the target of an invocation."
Source: "mscorlib"
StackTrace: " at System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor, Boolean& bNeedSecurityCheck)\r\n at System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark)\r\n at System.RuntimeType.CreateInstanceDefaultCtor(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark)\r\n at System.Activator.CreateInstance(Type type, Boolean nonPublic)\r\n at System.RuntimeType.CreateInstanceImpl(BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes, StackCrawlMark& stackMark)\r\n at System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes)\r\n at System.Activator.CreateInstance(String assemblyString, String typeName, Boolean ignoreCase, BindingFlags bindingAttr, Bi
nder binder, Object[] args, CultureInfo culture, Object[] activationAttributes, Evidence securityInfo, StackCrawlMark& stackMark)\r\n at System.Activator.CreateInstance(String assemblyName, String typeName)\r\n at xxxx in xx"
TargetSite: {System.Object CreateInstance(System.RuntimeType, Boolean, Boolean, Boolean ByRef, System.RuntimeMethodHandleInternal ByRef, Boolean ByRef)}
Any help is highly appreciated.

Try passing Type only.
Assembly assembly = Assembly.LoadFrom(path);
Type type = assembly.GetType("Namespace.className");
object instance = Activator.CreateInstance(type);

Error creating new outlook email from the server

I have a function that can create a new email in outlook and it works fine when running on my local machine. However, when deployed to the server i get the error shown below.
This is what it looks like when I run the code on my local machine:
Link. Is it possible to make this code run on the server and generate emails for users?
Error:
System.Runtime.InteropServices.COMException (0x80080005): Retrieving the COM class factory for component with CLSID {0006F03A-0000-0000-C000-000000000046} failed due to the following error: 80080005 Server execution failed (Exception from HRESULT: 0x80080005 (CO_E_SERVER_EXEC_FAILURE)). at System.Runtime.Remoting.RemotingServices.AllocateUninitializedObject(RuntimeType objectType) at System.Runtime.Remoting.Activation.ActivationServices.CreateInstance(RuntimeType serverType) at System.Runtime.Remoting.Activation.ActivationServices.IsCurrentContextOK(RuntimeType serverType, Object[] props, Boolean bNewObj) at System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor, Boolean& bNeedSecurityCheck) at System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark) at System.RuntimeType.CreateInstanceDefaultCtor(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark) at System.Activator.CreateInstance(Type type, Boolean nonPublic) at System.Activator.CreateInstance(Type type) at MyProjectName.btnEmailEstimate_Click(Object sender, EventArgs e) in D:\My\Project\location\MyProjectName.ascx.cs:line 9833
Here is my code:
protected void btnEmailEstimate_Click(object sender, EventArgs e)
{
try
{
List<string> lstAllRecipients = new List<string>();
//Below is hardcoded - can be replaced with db data
lstAllRecipients.Add("test1#testmail.com");
lstAllRecipients.Add("test2#testmail.com");
Outlook.Application outlookApp = new Outlook.Application();
Outlook._MailItem oMailItem = (Outlook._MailItem)outlookApp.CreateItem(Outlook.OlItemType.olMailItem);
Outlook.Inspector oInspector = oMailItem.GetInspector;
// Recipient
Outlook.Recipients oRecips = (Outlook.Recipients)oMailItem.Recipients;
foreach (String recipient in lstAllRecipients)
{
Outlook.Recipient oRecip = (Outlook.Recipient)oRecips.Add(recipient);
oRecip.Resolve();
}
//Add CC
Outlook.Recipient oCCRecip = oRecips.Add("testCC#testmail.com");
oCCRecip.Type = (int)Outlook.OlMailRecipientType.olCC;
oCCRecip.Resolve();
//Add Subject
oMailItem.Subject = "Test Mail";
// body, bcc etc...
oMailItem.Body = "Email body content here \nThis is a new line.";
//Display the mailbox
oMailItem.Display(true);
var time = DateTime.Now;
tbLast_email_update.Text = time.ToString();
}
catch (Exception objEx)
{
Response.Write(objEx.ToString());
}
}

Error while creating recurring job using Hangfire

I'm trying to use Hangfire in my application to fetch( from external APIs) currency conversion rates on a daily basis and insert in application database.
Successfully configured ( think so ) and the Hangfire Tables are created in the DB and the Job table is having entries but the Job is not successfully executed and while checking the State Table it shows failed and have an error message like
{"FailedAt":"2017-10-12T07:55:00.3075439Z",
"ExceptionType":"System.MissingMethodException",
"ExceptionMessage":"Cannot create an instance of an interface.",
"ExceptionDetails":"System.MissingMethodException: Cannot create an instance of an interface.\r\n
at System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor, Boolean& bNeedSecurityCheck)\r\n
at System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark)\r\n
at System.RuntimeType.CreateInstanceDefaultCtor(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark)\r\n
at System.Activator.CreateInstance(Type type, Boolean nonPublic)\r\n at System.Activator.CreateInstance(Type type)\r\n at Hangfire.JobActivator.ActivateJob(Type jobType)\r\n
at Hangfire.JobActivator.SimpleJobActivatorScope.Resolve(Type type)\r\n at Hangfire.Server.CoreBackgroundJobPerformer.Perform(PerformContext context)\r\n
at Hangfire.Server.BackgroundJobPerformer.<>c__DisplayClass8_0.<PerformJobWithFilters>b__0()\r\n
at Hangfire.Server.BackgroundJobPerformer.InvokePerformFilter(IServerFilter filter, PerformingContext preContext, Func`1 continuation)\r\n
at Hangfire.Server.BackgroundJobPerformer.<>c__DisplayClass8_1.<PerformJobWithFilters>b__2()\r\n
at Hangfire.Server.BackgroundJobPerformer.PerformJobWithFilters(PerformContext context, IEnumerable`1 filters)\r\n
at Hangfire.Server.BackgroundJobPerformer.Perform(PerformContext context)\r\n
at Hangfire.Server.Worker.PerformJob(BackgroundProcessContext context, IStorageConnection connection, String jobId)"}
Code used :
public partial class Startup
{
public void Configuration(IAppBuilder app)
{
ConfigureAuth(app);
GlobalConfiguration.Configuration.UseSqlServerStorage("ERPContext");
RecurringJob.AddOrUpdate<IAPIRequest>(x => x.ProcessCurrencyConversion(), Cron.MinuteInterval(1));
app.UseHangfireDashboard();
app.UseHangfireServer();
}
}
Interface and Class which has the Method to executed
public interface IAPIRequest
{
void ProcessCurrencyConversion();
}
public class APIRequest : IAPIRequest
{
public void ProcessCurrencyConversion()
{
WebClient client = new WebClient();
string urlPattern = "https://query.yahooapis.com/v1/public/yql?q=select%20*%20from%20yahoo.finance.xchange%20where%20pair%20in%20(%22USDKWD,EURKWD,GBPKWD,AEDKWD,ZARKWD%22)&format=json&env=store%3A%2F%2Fdatatables.org%2Falltableswithkeys";
var jsonResult = client.DownloadString(urlPattern);
dynamic results = JsonConvert.DeserializeObject<dynamic>(jsonResult);
var rates = results.rate;
List<CurrencyJSON> currencies = new List<CurrencyJSON>();
using (var db = new ERPContext())
{
foreach (var rate in rates)
{
var currencyJson = new CurrencyJSON();//POCO
currencyJson.Bid = rate.Bid;
currencyJson.Name = rate.Name;
currencies.Add(currencyJson);
}
db.Configuration.AutoDetectChangesEnabled = false;
db.Configuration.ValidateOnSaveEnabled = false;
db.CurrencyJson.ToList().AddRange(currencies);
db.SaveChanges();
}
}
}
What am I doing wrong?
Appreciate any help , Thanks in advance .
Have already checked similar question posted here but didn't help .

As #Diado pointed out in the comments, HangFire needs a IoC if using an Interface as there is no default support. Or you can use the Class directly instead of an interface.
https://github.com/devmondo/HangFire.SimpleInjector is one of the IoC injector which I used .

Creating Windows service to send automated email through outlook com interop

I am trying to develop an application that sends automated emails through outlook and interop services and getting the following exception. below is the code with exception.
try
{
Microsoft.Office.Interop.Outlook.Application app = new Microsoft.Office.Interop.Outlook.Application();
Microsoft.Office.Interop.Outlook.MailItem mailItem = (Outlook.MailItem)app.CreateItem(Outlook.OlItemType.olMailItem);
mailItem.Subject = "Details of Subject";
mailItem.To = "example#gmail.com";
mailItem.Body = "Automated email testing"
// mailItem.Attachments.Add(logPath);//logPath is a string holding path to the log.txt file
mailItem.Importance = Outlook.OlImportance.olImportanceHigh;
mailItem.Display(false);
mailItem.Send();
}
catch (Exception ex)
{
WriteErrorLog("\n");
WriteErrorLog(ex.Message);
WriteErrorLog(ex.StackTrace);
}
And its throwing an exception :
System.Runtime.Remoting.RemotingServices.AllocateUninitializedObject(RuntimeType objectType) at System.Runtime.Remoting.Activation.ActivationServices.CreateInstance(RuntimeType serverType) at System.Runtime.Remoting.Activation.ActivationServices.IsCurrentContextOK(RuntimeType serverType, Object[] props, Boolean bNewObj)
at System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor, Boolean& bNeedSecurityCheck)
at System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark)
at System.RuntimeType.CreateInstanceDefaultCtor(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark)
at System.Activator.CreateInstance(Type type, Boolean nonPublic)
at System.Activator.CreateInstance(Type type)
at WServiceMixInOne.ConnectionLogs.MainClass() in C:\Users\admin\documents\visual studio 2017\Projects\WServiceMixInOne\WServiceMixInOne\ConnectionLogs.cs:line 120
Line 120 is the 1st line app = new Microsoft.Office.Interop.Outlook.Application();

Try closing outlook from background process. And then execute your code.

MMC development in c#

Hi i am developing MMC snap in C#,
in this i want to read XML file so where to put my xml file.
the code is not giving any build error but when i am adding the snapin in MMC its giveing error what to do.
[SnapInSettings("{2078B103-76FF-46E1-95BB-8B2CE3A72E60}",
DisplayName = "Configuration",
Description = "abc Pvt Ltd.")
]
public class Mymmc : SnapIn
{
XDocument xDoc;
public Sararmmc()
{
ScopeNode childscopenode;
xDoc = XDocument.Load("MMCSnapinXML.xml");
IEnumerable<XElement> xelements = xDoc.Root.Descendants();
this.RootNode = new ScopeNode();
this.RootNode.DisplayName = xDoc.Root.Attribute("name").Value;
foreach (XElement elm in xelements)
{
childscopenode = new ScopeNode();
childscopenode.DisplayName = elm.Attribute("name").Value;
this.RootNode.Children.Add(childscopenode);
}
}
}
i am getting
Exception has been thrown by the target of an invocation.
Server stack trace:
at System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandle& ctor, Boolean& bNeedSecurityCheck)
at System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean fillCache)
at System.RuntimeType.CreateInstanceImpl(Boolean publicOnly, Boolean skipVisibilityChecks, Boolean fillCache)
at System.Activator.CreateInstance(Type type, Boolean nonPublic)
at System.RuntimeType.CreateInstanceImpl(BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes)
at System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes)
at System.Activator.CreateInstance(String assemblyName, String typeName, Boolean ignoreCase, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes, Evidence securityInfo, StackCrawlMark& stackMark)
at System.Activator.CreateInstance(String assemblyName, String typeName)
at System.AppDomain.CreateInstance(String assemblyName, String typeName)
at System.AppDomain.CreateInstanceAndUnwrap(String assemblyName, String typeName)
at Microsoft.ManagementConsole.Internal.SnapInClient.CreateSnapIn(String assemblyName, String typeName)
at Microsoft.ManagementConsole.Internal.ClassLibraryServices.Microsoft.ManagementConsole.Internal.IClassLibraryServices.CreateSnapIn(String assemblyName, String typeName)
at System.Runtime.Remoting.Messaging.StackBuilderSink._PrivateProcessMessage(IntPtr md, Object[] args, Object server, Int32 methodPtr, Boolean fExecuteInContext, Object[]& outArgs)
at System.Runtime.Remoting.Messaging.StackBuilderSink.PrivateProcessMessage(RuntimeMethodHandle md, Object[] args, Object server, Int32 methodPtr, Boolean fExecuteInContext, Object[]& outArgs)
at System.Runtime.Remoting.Messaging.StackBuilderSink.SyncProcessMessage(IMessage msg, Int32 methodPtr, Boolean fExecuteInContext)
Exception rethrown at [0]:
at Microsoft.ManagementConsole.Executive.SnapInInitializationOperation.OnStart()
at Microsoft.ManagementConsole.Executive.Operation.Start()
at Microsoft.ManagementConsole.Executive.RunningOperationsTable.EnqueueOperation(Operation operation)
at Microsoft.ManagementConsole.Executive.StandAloneComponentData..ctor(SnapInRegistrationInfo info, Int32 bookkeepingId)
at Microsoft.ManagementConsole.Advanced.FrameworkSnapInFactory.Microsoft.ManagementConsole.Advanced.ISnapInFactory.CreateSnapIn(Int32 bookkeepingId, String snapInKey, Object& snapIn)

There are many exceptions which could be thrown in your constructor (the stack trace indicates that this is the source of the error). It could be a malformed XML exception is thrown on XDocument.Load, it could also be null reference exception if any of the named nodes/attributes you're accessing don't exist. It could be a file not found exception, or even a SecurityException - it could even be something more obscure such as MMC requiring that your assembly is signed.. without knowing what type of exception you're getting it's very difficult for anyone to help you!
As I said in my comment, when you receive errors at runtime that you can't easily explain - this is when having verbose logging in your application becomes really valuable! NLog and log4net are the two most popular logging frameworks for .NET applications