LockHolder

example.cs

object lockHandle = new object();

using (LockHolder<object> lockObj = new LockHolder<object>

    (lockHandle, 1000))
{
    if (lockObj.LockSuccessful)
    {
        // work elided
    }
}
// Dispose called here.

LockHolder.cs

// http://www.informit.com/articles/article.aspx?p=1231461

public sealed class LockHolder<T> : IDisposable where T : class
{
    private T handle;
    private bool holdsLock;

    public LockHolder(T handle, int milliSecondTimeout)
    {
        this.handle = handle;
        holdsLock = System.Threading.Monitor.TryEnter(
            handle, milliSecondTimeout);
    }

    public bool LockSuccessful
    {
        get { return holdsLock; }
    }

    #region IDisposable Members
    public void Dispose()
    {
        if (holdsLock)
            System.Threading.Monitor.Exit(handle);
        // Don’t unlock twice
        holdsLock = false;
    }