C#

class SynchronizedMailBox : MailBox
    {
        private static ManualResetEvent mre = new ManualResetEvent(false);//signale for blocking till first set() call
        private static Mutex mainMutex = new Mutex(false);

        public override void Write(Message msg)
        {
            mainMutex.WaitOne();//lock array Message for writing into it

                if (IsEmpty())//if array message is still empty, release all waiting read thread (if any) 
                    mre.Set();

                base.Write(msg);

            mainMutex.ReleaseMutex();//unLock array Message after writing into it
        }

        public override Message Read()
        {
            mainMutex.WaitOne();//lock array Message for reading from it

                mre.WaitOne();//if first thread is for reading, and array message is empty, wait here
            
                Message ms = base.Read();

                if (IsEmpty())//if after reading no messages has left, reset(), for next thread to be blocked before reading
                    mre.Reset();

            mainMutex.ReleaseMutex();//unLock array Message after reading from it

            return ms;
        }
    }

if (IsEmpty())//if array message is still empty, release all waiting read thread (if any)
                   mre.Set();

igalep132 wrote:

the fact that write method is still under the mutex will prevent from unblocked reading thread/s to continue running ?

ekareem wrote:

1- Do I have to get permission from the author first to use his/her control or not?

ekareem wrote:

2- Are there other obligations on me towards any other party?

faslesabz wrote:

How can we create a program like osk(on screen keyboard)that have focus on itself and other application in a same time

faslesabz wrote:

2.is it possible to run windows .net applications in windows before windows logon as a service?

faslesabz wrote:

is it possible to locate the application in a specific part of screen in C#
if you want to understand type magnify in run (in windows xp) to see wath I mean,it changes the screen resolution and runs on top of the screen where no other programs can run,maybe another desktop!

lukeer wrote:

cannot use both abstract and static keywords

PIEBALDconsult wrote:

Do you want each child class to have its own icon to be shared among the instances of that child class?

abstract class BaseClass
{
    protected static readonly Icon BaseIcon = new Icon("...");

    public abstract Icon DisplayIcon
    {
        get;
    }
}

class ChildClassOne : BaseClass
{
    static readonly Icon ChildIcon = new Icon("...");

    public override Icon  DisplayIcon
    {
        get { return ChildClassOne.ChildIcon; }
    }
}

class ChildClassTwo : BaseClass
{
    public override Icon DisplayIcon
    {
        get { return BaseClass.BaseIcon; }
    }
}

public class Base {
    private static Icon baseIcon=...;
    protected Icon myIcon=baseIcon;
...
}

public class Child : Base {
    private static Icon childIcon=...;

    public Child() {
        myIcon=childIcon;
    }
...
}

public class Base<T>
{
    protected static string icon ;

    public string
    Icon
    {
        get
        {
            return ( icon ) ;
        }
    }
}

public class Child1 : Base<Child1>
{
    static Child1
    (
    )
    {
        icon = "Child1" ;

        return ;
    }
}

public class Child2 : Base<Child2>
{
    static Child2
    (
    )
    {
        icon = "Child2" ;

        return ;
    }
}