<refactor>

src/Pwd/Main.cs

@@ -0,0 +1,53 @@
+using NSExt.Extensions;
+using TextCopy;
+
+namespace Dot.Pwd;
+
+public sealed class Main : Tool<Option>
+{
+    private readonly char[][] _charTable = {
+                                               "0123456789".ToCharArray() //
+                                             , "abcdefghijklmnopqrstuvwxyz".ToCharArray()
+                                             , "ABCDEFGHIJKLMNOPQRSTUVWXYZ".ToCharArray()
+                                             , "!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~".ToCharArray()
+                                           };
+
+
+    public Main(Option opt) : base(opt) { }
+
+    public override void Run()
+    {
+        unsafe {
+            var pSource   = stackalloc char[_charTable.Sum(x => x.Length)];
+            var pDest     = stackalloc char[Opt.Length];
+            var sourceLen = 0;
+
+            if (Opt.Type.HasFlag(Option.GenerateTypes.Number))
+                foreach (var c in _charTable[0])
+                    *(pSource + sourceLen++) = c;
+
+
+            if (Opt.Type.HasFlag(Option.GenerateTypes.LowerCaseLetter))
+                foreach (var c in _charTable[1])
+                    *(pSource + sourceLen++) = c;
+
+            if (Opt.Type.HasFlag(Option.GenerateTypes.UpperCaseLetter))
+                foreach (var c in _charTable[2])
+                    *(pSource + sourceLen++) = c;
+
+
+            if (Opt.Type.HasFlag(Option.GenerateTypes.SpecialCharacter))
+                foreach (var c in _charTable[3])
+                    *(pSource + sourceLen++) = c;
+
+
+            var randScope = new[] { 0, sourceLen };
+            for (var i = 0; i != Opt.Length; ++i) //
+                *(pDest + i) = *(pSource + randScope.Rand());
+
+            var result = new string(pDest, 0, Opt.Length);
+            ClipboardService.SetText(result);
+            Console.WriteLine(Strings.Copied, result);
+        }
+    }
+}

src/Pwd/Option.cs

@@ -0,0 +1,21 @@
+namespace Dot.Pwd;
+
+[Verb("pwd", HelpText = nameof(Strings.RandomPasswordGenerator), ResourceType = typeof(Strings))]
+public class Option : IOption
+{
+    [Flags]
+    public enum GenerateTypes
+    {
+        Number           = 1
+      , LowerCaseLetter  = 2
+      , UpperCaseLetter  = 4
+      , SpecialCharacter = 8
+    }
+
+    [Value(1, Required = true, HelpText = nameof(Strings.PwdLength), ResourceType = typeof(Strings))]
+    public int Length { get; set; }
+
+
+    [Value(0, Required = true, HelpText = nameof(Strings.PwdGenerateTypes), ResourceType = typeof(Strings))]
+    public GenerateTypes Type { get; set; }
+}