Catel.MVVM.CommandManager.CreateCommand C# (CSharp) Метод

        public void CreateCommand(string commandName, InputGesture inputGesture = null, ICompositeCommand compositeCommand = null,
            bool throwExceptionWhenCommandIsAlreadyCreated = true)
        {
            Argument.IsNotNullOrWhitespace("commandName", commandName);

            lock (_lockObject)
            {
                Log.Debug("Creating command '{0}' with input gesture '{1}'", commandName, ObjectToStringHelper.ToString(inputGesture));

                if (_commands.ContainsKey(commandName))
                {
                    var error = $"Command '{commandName}' is already created using the CreateCommand method";
                    Log.Error(error);

                    if (throwExceptionWhenCommandIsAlreadyCreated)
                    {
                        throw new InvalidOperationException(error);
                    }

                    _commandGestures[commandName] = inputGesture;
                    return;
                }

                if (compositeCommand == null)
                {
                    compositeCommand = new CompositeCommand();
                }

                _commands.Add(commandName, compositeCommand);
                _originalCommandGestures.Add(commandName, inputGesture);
                _commandGestures.Add(commandName, inputGesture);

                CommandCreated.SafeInvoke(this, () => new CommandCreatedEventArgs(compositeCommand, commandName));
            }
        }
#else

            public void ThrowsInvalidOperationExceptionForAlreadyCreatedCommand()
            {
                var commandManager = new CommandManager();

                commandManager.CreateCommand("MyCommand");

                ExceptionTester.CallMethodAndExpectException<InvalidOperationException>(() => commandManager.CreateCommand("MyCommand"));
            }