need knowledge, everyone!!

Question

3.00/5 (1 vote)

See more:

hi everyone,

i am just a new in C#. i saw many programs but most of the programs are confusing for me..could u help me?

in main Program.cs,
there is one thing i don't know..

C#

static class Program
   {
       [STAThread]
       static void Main()
       {

       }

in this example, what does it mean [] ??
i saw many programs with [ ].
what does it suppose to mean??

Posted 1-Mar-12 18:30pm

Doyle Raymond

Add a Solution

5 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Rockstar_G · Accepted Answer · 2012-03-01T18:46:00

The STAThreadAttribute is essentially a requirement for the Windows message pump to communicate with COM components. Although core Windows Forms does not use COM, many components of the OS such as system dialogs do use this technology.

MSDN explains the reason in slightly more detail:

STAThreadAttribute indicates that the COM threading model for the application is single-threaded apartment. This attribute must be present on the entry point of any application that uses Windows Forms; if it is omitted, the Windows components might not work correctly. If the attribute is not present, the application uses the multithreaded apartment model, which is not supported for Windows Forms.

This blog post (Why is STAThread required?) also explains the requirement quite well. If you want a more in-depth view as to how the threading model works at the CLR level, see this MSDN Magazine article.
have a look at this article:
http://msdn.microsoft.com/en-us/library/system.stathreadattribute.aspx[^]

Varun Sareen · Accepted Answer · 2012-03-01T18:42:00

Dear friend,

[] means ATTRIBUTE.

The STAThread attribute is related to COM components, and has more or less nothing to do with how many threads you application has.

So, an application can be STAThread'ede (Single-Threaded Apartment) and still have multiple threads.

759,000 results what is stathread in c#?

I hope this will clear your confusion. Please don't forget to mark this as your answer if it helps you out.

Thanks

uspatel · Accepted Answer · 2012-03-01T18:45:00

Solution 2

These are attributes.
you can search for various articles on attributes in c#
Attributes in C#[^]
http://msdn.microsoft.com/en-us/library/aa288454(v=vs.71).aspx[^]
http://msdn.microsoft.com/en-us/library/byxd99hx(v=vs.71).aspx[^]

Posted 1-Mar-12 18:45pm

uspatel

thatraja · Accepted Answer · 2012-03-01T18:49:00

Solution 4

Attributes[^]

Also check this article Attributes in C#[^]

Posted 1-Mar-12 18:49pm

thatraja

Career Web Helper · Accepted Answer · 2012-03-01T20:27:00

Hey ur answers for-
what does it mean [] ?
->It's syntax for Attribute in C#
refer Attributes in C#[^]
and
[STAThread] means?
It means that Windows Forms programs use a single-threaded apartment state. MTA and free threaded apartment states are not supported.
-When the STAThreadAttribute is applied, it changes the apartment state of the current thread to be single threaded. Without getting into a huge discussion about COM and threading, this attribute ensures the communication mechanism between the current thread and other threads that may want to talk to it via COM. When you're using Windows Forms, depending on the feature you're using, it may be using COM interop in order to communicate with operating system components. Good examples of this are the Clipboard and the File Dialogs.

need knowledge, everyone!!

5 solutions

Solution 3

Solution 1

Solution 2

Solution 4

Solution 5

Add your solution here

Preview 0