Hello tahir,
In more descriptive way you can do the things like this.
In detail you can either use the lock keyword,apply lock over a private object and put the code which accesses the file within that lock..
lock(obj)
{
//code here
}
The lock keyword marks a statement block as a critical section by obtaining the mutual-exclusion lock for a given object, executing a statement(your code section), and then releasing the lock. This statement takes the
following form:
this will synchronize betweenn threads as a process
But in order to ensure sync between threads of multiple processes..i.e. if say users from different processes can access this file
then you shud use Mutex
//create mutex object.
then mutex.acquiremutex()
then
// ur code to access file and
then to release mutex
Like below sample
class Test
{
// Create a new Mutex. The creating thread does not own the
// Mutex.
private static Mutex mut = new Mutex();
private const int numIterations = 1;
private const int numThreads = 3;
static void Main()
{
// Create the threads that will use the protected resource.
for(int i = 0; i < numThreads; i++)
{
Thread myThread = new Thread(new ThreadStart(MyThreadProc));
myThread.Name = String.Format("Thread{0}", i + 1);
myThread.Start();
}
// The main thread exits, but the application continues to
// run until all foreground threads have exited.
}
private static void MyThreadProc()
{
for(int i = 0; i < numIterations; i++)
{
UseResource();
}
}
// This method represents a resource that must be synchronized
// so that only one thread at a time can enter.
private static void UseResource()
{
// Wait until it is safe to enter.
mut.WaitOne();
Console.WriteLine("{0} has entered the protected area",
Thread.CurrentThread.Name);
// Place code to access non-reentrant resources here.
// Simulate some work.
Thread.Sleep(500);
Console.WriteLine("{0} is leaving the protected area\r\n",
Thread.CurrentThread.Name);
// Release the Mutex.
mut.ReleaseMutex();
}
}
Hope this will help you !!
Regards
D