System.Threading.Mutex.OpenExisting C# (CSharp) Method

        public static Mutex OpenExisting(string name)
        {
            if (name == null)
            {
                throw new ArgumentNullException("name", Environment.GetResourceString("ArgumentNull_WithParamName"));
            }

            if(name.Length  == 0)
            {
                throw new ArgumentException(Environment.GetResourceString("Argument_EmptyName"), "name");
            }
            if(System.IO.Path.MAX_PATH < name.Length)
            {
                throw new ArgumentException(Environment.GetResourceString("Argument_WaitHandleNameTooLong",name));
            }
            

            // To allow users to view & edit the ACL's, call OpenMutex
            // with parameters to allow us to view & edit the ACL.  This will
            // fail if we don't have permission to view or edit the ACL's.  
            // If that happens, ask for less permissions.
            SafeWaitHandle myHandle = Win32Native.OpenMutex(Win32Native.MUTEX_MODIFY_STATE | Win32Native.SYNCHRONIZE, false, name);

            int errorCode = 0;
            if (myHandle.IsInvalid)
            {
                errorCode = Marshal.GetLastWin32Error();

                if(Win32Native.ERROR_FILE_NOT_FOUND == errorCode || Win32Native.ERROR_INVALID_NAME == errorCode)
                {
                    throw new WaitHandleCannotBeOpenedException();
                }
                
                if(null != name && 0 != name.Length && Win32Native.ERROR_INVALID_HANDLE == errorCode) 
                {
                    throw new WaitHandleCannotBeOpenedException(Environment.GetResourceString("Threading.WaitHandleCannotBeOpenedException_InvalidHandle", name));
                }

                // this is for passed through Win32Native Errors
                __Error.WinIOError(errorCode,name);
            }

            return new Mutex(myHandle);
        }

 public static Mutex OpenExisting(string name)
 {
     return(Mutex.OpenExisting(name, MutexRights.Modify | MutexRights.Synchronize));
 }