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When you create an empty WinForms application with Visual Studio, the template has the STAThread attribute in the main application class. I have been reading some docs about it, but I'm not sure if I understood it at all. Really I have some questions about it: Why is this attribute added? What does it mean? What happens if you remove this attribute? TomTom 1. Why is this attribute added? Because it is required by the ActiveX object model. And you can drop ActiveX controls on a WinForm (so it is there for compatibility) OR some .NET classes use native controls which require that attribute. 2.

I am still kind of new to C#, and especially threading in C#. I am trying to start a function that requires a single threaded apartment ( STAThread ) But I am not able to compile the following code: The function looks as follows in a separate class called MyClass : internal static string DoX(string n, string p) { // does some work here that requires STAThread } I have tried the attribute [STAThread] on top of the function but that does not work. So I am trying to create a new Thread as follows: Thread t = new Thread(new ThreadStart(MyClass.DoX)); but this will not compile (The best overloaded

I would like to test an app that uses the Clipboard (WindowsForms) and I need the Clipboard in my unit tests also. In order to use it, it should run in STA mode, but since the NUnit TestFixture does not have a main method, I don't know where/how to annotate it. Bernhard Hofmann For NUnit 2.2, 2.4 (See simple solution below for 2.5): Add an app.config file to the project containing your unit tests and include the following: <?xml version="1.0" encoding="utf-8" ?> <configuration> <configSections> <sectionGroup name="NUnit"> <section name="TestRunner" type="System.Configuration

I am new to WPF, and in every tutorial I read, they either have a [System.STAThread] attribute applied to their Main method, or they tell the reader to do that. Is this attribute really "required"? And if so, why? This is more a Windows requirement than a WPF one, and goes back to the original design of Windows forms and controls, from before .NET. STAThread refers to "Single-Threaded Apartments" which refers to the threading model used by the current (main) thread. The threading model in use dictates how other .NET and COM applications will talk to your application (and inherently, its

When you create an empty WinForms application with Visual Studio, the template has the STAThread attribute in the main application class. I have been reading some docs about it, but I'm not sure if I understood it at all. Really I have some questions about it: Why is this attribute added? What does it mean? What happens if you remove this attribute? TomTom 1. Why is this attribute added? Because it is required by the ActiveX object model. And you can drop ActiveX controls on a WinForm (so it is there for compatibility) OR some .NET classes use native controls which require that attribute. 2.

I have created a Windows Service that will be calling out to some COM components, so I tagged [STAThread] to the Main function. However, when the timer fires, it reports MTA and the COM calls fail. How can I fix this? using System; using System.Diagnostics; using System.ServiceProcess; using System.Threading; using System.Timers; namespace MyMonitorService { public class MyMonitor : ServiceBase { #region Members private System.Timers.Timer timer = new System.Timers.Timer(); #endregion #region Construction public MyMonitor () { this.timer.Interval = 10000; // set for 10 seconds this.timer