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Presentation/HushianWebApp/Service/CaptchaService.cs

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+using System;
+using System.Drawing;
+using System.Drawing.Imaging;
+using System.IO;
+using System.Text;
+
+namespace HushianWebApp.Service
+{
+    public static class CaptchaService
+    {
+        public static string GetCaptchaWord(int length)
+        {
+            var random = new Random(DateTime.Now.Millisecond);
+
+            //  const string chars = "ABCDEFGHJKLMNPQRSTUWYZabcdefghijkmnpqrstuwz23456789*#!$%=";
+            const string chars = "ABCDEFGHJKLMNPQRSTUWYZabcdefghijkmnpqrstuwz23456789";
+            string cw = new(Enumerable.Repeat(chars, length)
+                                      .Select(s => s[random.Next(s.Length)])
+                                      .ToArray());
+
+            return cw;
+        }
+        public static string GenerateCaptchaBase64(string text, int width = 120, int height = 40)
+        {
+            return "";
+        }
+    }
+}