System.Net.TimerThread.Timer.Cancel C# (CSharp) Метод

            internal abstract bool Cancel();

        internal string FindProxyForURL(string url, string host)
        {
            if (url == null || host == null)
            {
                throw new ArgumentNullException(url == null ? "url" : "host");
            }
            if (closed != 0)
            {
                throw new ObjectDisposedException(GetType().Name);
            }

            EXCEPINFO exceptionInfo = new EXCEPINFO();
            object    result        = null;

            jscript.GetCurrentScriptThreadID(out interruptThreadId);
            TimerThread.Timer timer = s_TimerQueue.CreateTimer(s_InterruptCallback, this);
            activeTimer = timer;
            try
            {
                GlobalLog.Print("AutoWebProxyScriptWrapper#" + ValidationHelper.HashString(this) + "::FindProxyForURL() Calling url:" + url + " host:" + host);
                result = script.FindProxyForURL(url, host);
            }
            catch (Exception exception)
            {
                if (NclUtilities.IsFatal(exception))
                {
                    throw;
                }
                if (exception is TargetInvocationException)
                {
                    exception = exception.InnerException;
                }
                COMException comException = exception as COMException;
                if (comException == null || comException.ErrorCode != (int)HRESULT.SCRIPT_E_REPORTED)
                {
                    throw;
                }
                GlobalLog.Print("AutoWebProxyScriptWrapper#" + ValidationHelper.HashString(this) + "::FindProxyForURL() Script error:[" + this.host.ExceptionMessage == null ? "" : this.host.ExceptionMessage + "]");
            }
            catch {
                GlobalLog.Print("AutoWebProxyScriptWrapper#" + ValidationHelper.HashString(this) + "::FindProxyForURL() Script error:[Non-CLS Compliant Exception]");
                throw;
            }
            finally
            {
                activeTimer = null;
                timer.Cancel();
            }

            string proxy = result as string;

            if (proxy != null)
            {
                GlobalLog.Print("AutoWebProxyScriptWrapper#" + ValidationHelper.HashString(this) + "::FindProxyForURL() found:" + proxy);
                return(proxy);
            }

            GlobalLog.Print("AutoWebProxyScriptWrapper#" + ValidationHelper.HashString(this) + "::FindProxyForURL() Returning null. result:" + ValidationHelper.ToString(exceptionInfo.bstrDescription) + " result:" + ValidationHelper.ToString(result) + " error:" + ValidationHelper.ToString(exceptionInfo.bstrDescription));
            return(null);
        }