Initial implementation

testfiles/mixed.cs

@@ -0,0 +1,14 @@
+public class Startup
+{
+    // safe config name
+    public const string ApiKeyName = "access_key";
+
+    // suspicious placeholder
+    private string tokenExample = "your_token_here_1234567890abcdef";
+
+    // real secret
+    private string stripeKey = "sk_live_1234567890abcdef";
+
+    // connection string
+    private string db = "Server=prod;Database=Main;User Id=admin;Password=SuperSecret;";
+}