invalidoperationexception Questions

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I've got this really, really weird error that I've never been able to pin down (it happens very rarely). Basically, I have a C# application that was randomly throwing an unknown exception on exit. ...
Colourable asked 27/10, 2011 at 5:33

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There is paradox in the exception description: Nullable object must have a value (?!) This is the problem: I have a DateTimeExtended class, that has { DateTime? MyDataTime; int? otherdata; ...
Brenneman asked 13/12, 2009 at 11:8

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foreach (string key in HttpContext.Current.Request.Form.AllKeys) { string value = HttpContext.Current.Request.Form[key]; } What is the .net core version of the above code? Seems like .net core t...

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If I surf to http://localhost:58472/Account/Register I've this exception System.InvalidOperationException: The current type, IUserStore<ApplicationUser>, is an interface and cannot be con...

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I have a web application running .net core 2.x (just upgraded from .net core 1.x finally) and I've gotten most everything ported from .net core 1.x to 2.x. I have however hit a brick wall with my I...

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Whenever I try to use MD5 on a Windows XP machine that has FIPS enabled, I am getting a System.InvalidOperationException. Is there an alternate algorithm that I should use instead of MD5 on FIPS? ...
Ethmoid asked 3/2, 2011 at 23:48

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throwing InvalidOperationException when I changed cell value for update and directly click on menu strip item for open new Winform. private void dgv_category_CellValueChanged(object sender, Data...
Hynda asked 19/9, 2016 at 13:22

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Due to various new security policies, we need to be able to run various tasks as an assigned uid. To assist in this, a common menu system was developed. One of the functions in the script is: $cre...
Falla asked 11/3, 2015 at 15:31

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I have a datagrid which gets data like this: public struct MyData { public string name { set; get; } public string artist { set; get; } public string location { set; get; } } DataGridText...
Insanity asked 4/8, 2011 at 21:53

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using System; using System.Collections.Generic; using System.Text; using System.Data.Sql; using System.Data.SqlClient; namespace BissUpdater { class Program { static void Main(string[] args) {...
Parasitism asked 22/3, 2013 at 8:57

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What is the analog for .Net InvalidOperationException in Python?
Shattuck asked 31/3, 2010 at 16:37

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Following this question Foreach loop for disposing controls skipping iterations it bugged me that iteration was allowed over a changing collection: For example, the following: List<Control&g...
Jarid asked 29/1, 2016 at 12:21

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I haven't used Queues<T> to any real degree before, so I might be missing something obvious. I'm trying to iterate through a Queue<EnemyUserControl> like this (every frame): foreach (v...
Penumbra asked 4/6, 2011 at 1:30

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We have a tool that manages several processes of a computer and from time to time in uncertain conditions we get an InvalidOperationExceptionwhen accessing the MSDN: Process.ExitTime property. The...
Blennioid asked 5/12, 2017 at 8:29

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I have written my own custom change monitor class for the .NET MemoryCache. It seems to initialize fine, but when I attempt to add it to the Cache, it throws an InvalidOperation exception - The met...
Dit asked 1/4, 2011 at 19:37

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I have a function that is called from cell_endedit. It moves a dataGridViewRow inside a dataGridView: private void moveRowTo(DataGridView table, int oldIndex, int newIndex) { if (newIndex < ol...
Pulmonary asked 23/10, 2014 at 7:9

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I have written a few MSBuild custom tasks that work well and are use in our CruiseControl.NET build process. I am modifying one, and wish to unit test it by calling the Task's Execute() method. ...
Inexistent asked 4/11, 2008 at 4:5

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I was testing my code and I thought that this piece of code was correct: while True: try: p = Decimal(raw_input(...)) if ...condition... : break else: raise ValueError except ValueError: pri...
Craigcraighead asked 31/12, 2015 at 12:10

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I'm seeing a System.Diagnostics.Process.HasExited method throw an InvalidOperationException, but the message text property is not terribly useful as to why it was thrown. Under what conditions does...
Battalion asked 8/4, 2010 at 20:39

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I've received the following error from the live site: System.Web.HttpUnhandledException: Exception of type 'System.Web.HttpUnhandledException' was thrown. ---> System.InvalidOperationException...

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We have recently upgraded our code base from .Net 4.0 to .Net 4.5.1 and from MVC 2.0 to MVC 5.2.2. We have a custom method in our base controller class which allowed us to update multiple parts of...
Bamboozle asked 23/10, 2014 at 17:20

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class Program { static void Main(string[] args) { var dictionary = new Dictionary<string, int>() { {"1", 1}, {"2", 2}, {"3", 3} }; foreach (var s in dict...
Geoid asked 13/10, 2009 at 20:28

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I have a standard, non-async action like: [HttpPost] public JsonResult StartGeneratePdf(int id) { PdfGenerator.Current.GenerateAsync(id); return Json(null); } The idea being that I know this P...

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public void Save() { XmlSerializer Serializer = new XmlSerializer(typeof(DatabaseInformation)); /* A first chance exception of type 'System.IO.FileNotFoundException' occurred in mscorlib.dll A...
Surrogate asked 23/3, 2010 at 7:31

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I'm starting a new process using the following code: Process p = new Process(); p.StartInfo.FileName = "..."; p.StartInfo.Arguments = "..."; p.Start(); p.WaitForExit(300000); // 5 minutes if (!p....
Olav asked 1/8, 2013 at 13:59

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