Small improvements

Author: Aymen TROUDI

03-Way/Commands/AbstractCommand.cs

@@ -12,31 +12,28 @@ protected AbstractCommand(string name) : base(name)
 
     public void AddHandler<T>(Action<T> action)
     {
-        AddArgument<T>(action);
+        AddArgument(action);
         AddHandler(CommandHandler.Create(action));
     }
 
     private void AddArgument<T>(Action<T> action)
     {
         var methodInfo = action.GetMethodInfo();
         var argumentName = GetArgumentName(methodInfo);
-        AddArgument(new Argument<T>(argumentName));
+        if (!string.IsNullOrWhiteSpace(argumentName))
+        {
+            AddArgument(new Argument<T>(argumentName));
+        }
     }
 
     private void AddHandler(ICommandHandler handler)
     {
         Handler = handler;
     }
 
-    private static string GetArgumentName(MethodBase method, int index = 0)
+    private static string? GetArgumentName(MethodBase method, int index = 0)
     {
-        var name = string.Empty;
-
-        if (index >= 0 && method.GetParameters().Length > index)
-        {
-            name = method.GetParameters()[index].Name;
-        }
-
-        return name!;
+        var parameters = method.GetParameters();
+        return parameters.Any() ? parameters[index].Name : null;
     }
 }

README.md

@@ -5,7 +5,7 @@
 Exploring ways of using System.CommandLine to build CLI tools
 ```
 
-In this repo, i m exploring various ways in order to build a simple cli tool based on [System.CommandLine](https://github.com/dotnet/command-line-api)
+In this repo, i m exploring various ways in order to build a simple cli tool based on [System.CommandLine](https://github.com/dotnet/command-line-api).
 >
 > :one: straightforward way
 > - pros : simplicity