In .NET, there are a variety of lock mechanisms available for multi-threaded programming to ensure thread safety and synchronization of shared resources. The following are common locking mechanisms in .NET:
1. **Monitor (mutex lock):** `Monitor` is one of the most basic locking mechanisms in .NET. It is implemented using the `lock` keyword, which ensures that only one thread can access the locked code block at the same time. `Monitor` is used to prevent multiple threads from accessing shared resources at the same time to avoid data races and inconsistencies.
```csharp
lock (lockObject)
{ // Code to access shared resources } ```
2. **Mutex (mutex):** `Mutex` is a global mutex lock that can be used across processes. It allows one thread or process to lock a shared resource and other threads or processes must wait for the lock to be released before they can access it.
```csharp
using System.Threading;
Mutex mutex = new Mutex(false, "MutexName");
mutex.WaitOne(); // Acquire lock
// Code to access shared resources
mutex.ReleaseMutex(); // Release
lock```
3. **Semaphore (Semaphore):** `Semaphore` allows multiple threads to access shared resources at the same time, but will block other threads after reaching a certain number of threads. It is often used to control the number of threads accessing a resource simultaneously.
```csharp
using System.Threadin