Log exception to file in c# .net core application explained

In production environment when any bug gets reported at that time as developer wants to get the exception details of bug to resolve the issue on high priority.
In some case there might be situation where exception is not logged in table but developer wants to check the bug immediately. for that purpose we need to write the
exception details including stack trace of bug in file. To implement this easily i am going to demonstrate the implementation of custom logging in file as below.

First we need to construct the exception and logger method in custom logger class as shown below.

public class CustomLogger { public static List<string> ConstructExceptionDetails(Exception ex,string FunctionName) { return new List<string>() { $"{DateTime.Now} - {FunctionName}", $"Exception: {ex.Message}", $"StackTrace: {ex.StackTrace}", $"InnerException: {ex.InnerException?.…

Remove Owin from MVC 5 Application and use asp.net custom forms authentication

Owin comes with 15 other dependencies when we add default "blank" mvc5 template in solution. Which some time is irrelevant to web application hence needs to be removed for adding custom authentication techniques in the web application. Remove the owin  from solution is tedious task but if we follow the below procedure then it can be easily removed from the solution.

  • Right click on your project and from menu click on Manage Nuget Packages.
    on left side of Manage Nuget Packages window click on Installed Package
    then on right side of window in search box type owin. 

  • Uninstall packages in order of:

    1. microsoft.aspnet.identity.owin
    2. microsoft.owin.host.systemweb
    3. microsoft.owin.security.cookies
    4. microsoft.owin.security.facebook
    5. microsoft.owin.security.google
    6. microsoft.owin.security.microsoftaccount
    7. microsoft.owin.security.twitter
    8. microsoft.aspnet.identity.entityframework
    9. microsoft.aspnet.identity.core
  • Open web.config file and remove these sections from   <runtime><assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1"> 
        <assemblyIdentity name="Microsoft.Owin" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="" newVersion="" />
        <assemblyIdentity name="Microsoft.Owin.Security.OAuth" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="" newVersion="" />
        <assemblyIdentity name="Microsoft.Owin.Security.Cookies" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="" newVersion="" />
        <assemblyIdentity name="Microsoft.Owin.Security" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="" newVersion="" />
  • Open bin folder and if there is any Owin assembly, delete all of them 
  • Or open web.config in <appSettings> section then add this <add key="owin:AutomaticAppStartup" value="false" />
  • Remove the element <remove name="FormsAuthentication" /> from the <system.webServer> <modules > this will enable the forms authentication in the application.
  • Now you can set authentication cookies in your login page using FormsAuthentication.SetAuthCookie(model.UserName, model.RememberMe);  method and check the ticket in the pages to authenticate the users


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