What methods can be used to prevent deadlocks in multithreaded applications?

To prevent deadlocks in multithreaded applications on C#, the following methods are used:

• Define and follow a consistent lock acquisition order: always acquire mutexes in the same order.
• Use timeouts when acquiring locks: to avoid infinite waiting.
• Minimize the duration of lock holding: execute only necessary code within the critical section.
• Avoid nested locks if possible: reduces the likelihood of cyclic dependencies.
• Use high-level synchronization primitives: such as ConcurrentDictionary, SemaphoreSlim, which reduce the need for manual lock management.

Example of maintaining lock acquisition order:

lock(obj1)
{
    lock(obj2)
    {
        // code
    }
}
// Always first obj1, then obj2