TemporaryDirectory will deleted at the end of process, Path of NSIS is besite of base directory.

Creator/Helper/TemporaryDirectory.cs

@@ -0,0 +1,28 @@
+using System;
+using System.Threading;
+
+namespace KattekerCreator.Helper
+{
+    public class TemporaryDirectory : IDisposable
+    {
+        public string Path { get; }
+
+        public TemporaryDirectory(string path)
+        {
+            Path = path;
+        }
+
+        void IDisposable.Dispose()
+        {
+            try
+            {
+                Thread.Sleep(100);
+                System.IO.Directory.Delete(Path, true);
+            }
+            catch
+            {
+                //ignore.
+            }
+        }
+    }
+}