how to catch all error in C# MVC (error handling)

Thank you for asking a question here.

You can place this method in Global.asax which will be executed, whenever error occurs in application

protected void Application_Error(object sender, EventArgs e)
        {
            Exception exception = Server.GetLastError();
            Response.Clear();

            HttpException httpException = exception as HttpException;

            if (httpException != null)
            {
                string action;

                switch (httpException.GetHttpCode())
                {
                    case 404:
                        // page not found
                        action = "HttpError404";
                        break;
                    case 500:
                        // server error
                        action = "HttpError500";
                        break;
                    default:
                        action = "General";
                        break;
                }

                // clear error on server
                Server.ClearError();
                 //Save error details in database
                using (var context = new DatabseCOnnection())
                {
                    var Error = new ErrorDetail();
                   
                    Error.ErrorMessage = exception.Message;
                 
                    context.ErrorDetails.Add(Error);
                    context.SaveChanges();
                }
//Redirect to ErrorController method based on error type
               Response.Redirect(String.Format("~/Error/{0}", action));
            }
        }

that's it

You might also like to add Custom Error pages to show a user a friendly error message in MVC, so here is the article for it : https://qawithexperts.com/article/asp-net/custom-error-pages-in-aspnet-mvc/242