feat: decode base64 encoded url

base64Decode.csx

@@ -0,0 +1,23 @@
+#r "System"
+#r "System.Text.Encoding"
+
+using System.Text;
+
+if (Args.Count == 0)
+{
+    Console.WriteLine("Usage: dotnet script base64Decode.csx <base64string>");
+    return;
+}
+
+try
+{
+    string base64Encoded = Args[0];
+    var base64Bytes = Convert.FromBase64String(base64Encoded);
+    var decodedString = Encoding.UTF8.GetString(base64Bytes);
+
+    Console.WriteLine("Decoded String: " + decodedString);
+}
+catch (FormatException)
+{
+    Console.WriteLine("Invalid Base64 string!");
+}