diff --git a/Program.cs b/Program.cs
index 1af4355..7a8812c 100644
--- a/Program.cs
+++ b/Program.cs
@@ -17,7 +17,7 @@ class Program {
             Console.WriteLine("1. Crea e mostra matrice quadrata");
             Console.WriteLine("2. Somma diagonale secondaria");
             Console.WriteLine("3. Media diagonale secondaria");
-            Console.WriteLine("5. Prodotto diagonale principale");
+            Console.WriteLine("4. Prodotto diagonale secondaria");
             Console.WriteLine("6. Valore minimo e massimo diagonale principale");
             Console.WriteLine("7. Trova zeri sulla diagonale principale");
             Console.WriteLine("8. Cerca sulla diagonale principale");
@@ -59,10 +59,10 @@ class Program {
                 case 4:
                     Console.Clear();
                     if (matrix != null) {
-                        //Console.WriteLine($"La media degli elementi della diagonale principale è {SommaMatriceDiagonale(matrix) / matrix.GetLength(0)}");
+                        Console.WriteLine($"Il prodotto degli elementi della diagonale principale è {ProdottoMatriceDiagonale2(matrix)}");
                     }
                     else {
-                        Console.WriteLine("È necessario creare la matrice prima di calcolare la media della diagonale principale.");
+                        Console.WriteLine("È necessario creare la matrice prima di calcolare il prodotto della diagonale principale.");
                     }
                     Pausa();
                     break;
@@ -165,4 +165,11 @@ class Program {
         }
         return ritorno;
     }
+    static int ProdottoMatriceDiagonale2(int[,] p_matrice) {
+        int ritorno = 1;
+        for (int r = 0; r < p_matrice.GetLength(0); r++) {
+            ritorno = ritorno * p_matrice[r, p_matrice.GetLength(1) - 1 - r];
+        }
+        return ritorno;
+    }
 }
diff --git a/bin/Debug/net9.0/matrix_3.dll b/bin/Debug/net9.0/matrix_3.dll
index 627c95c..f6c0486 100644
Binary files a/bin/Debug/net9.0/matrix_3.dll and b/bin/Debug/net9.0/matrix_3.dll differ
diff --git a/bin/Debug/net9.0/matrix_3.pdb b/bin/Debug/net9.0/matrix_3.pdb
index 576c20f..9f05a0c 100644
Binary files a/bin/Debug/net9.0/matrix_3.pdb and b/bin/Debug/net9.0/matrix_3.pdb differ
diff --git a/obj/Debug/net9.0/matrix_3.AssemblyInfo.cs b/obj/Debug/net9.0/matrix_3.AssemblyInfo.cs
index 90b1d5f..bdb5d63 100644
--- a/obj/Debug/net9.0/matrix_3.AssemblyInfo.cs
+++ b/obj/Debug/net9.0/matrix_3.AssemblyInfo.cs
@@ -13,10 +13,10 @@ using System.Reflection;
 [assembly: System.Reflection.AssemblyCompanyAttribute("matrix_3")]
 [assembly: System.Reflection.AssemblyConfigurationAttribute("Debug")]
 [assembly: System.Reflection.AssemblyFileVersionAttribute("1.0.0.0")]
-[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0+2a271926848667bcddcead0052bc6ea47fdebd86")]
+[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0+6014c313b202cd6198ffad5fdc9677bf63ff7c11")]
 [assembly: System.Reflection.AssemblyProductAttribute("matrix_3")]
 [assembly: System.Reflection.AssemblyTitleAttribute("matrix_3")]
 [assembly: System.Reflection.AssemblyVersionAttribute("1.0.0.0")]
 
-// Generated by the MSBuild WriteCodeFragment class.
+// Generato dalla classe WriteCodeFragment di MSBuild.
 
diff --git a/obj/Debug/net9.0/matrix_3.AssemblyInfoInputs.cache b/obj/Debug/net9.0/matrix_3.AssemblyInfoInputs.cache
index 855d6f9..9bf0859 100644
--- a/obj/Debug/net9.0/matrix_3.AssemblyInfoInputs.cache
+++ b/obj/Debug/net9.0/matrix_3.AssemblyInfoInputs.cache
@@ -1 +1 @@
-7aca69c8efa80f19ce3e2ea6d36183ecb1eed8e8b6ea588310183037a98ae435
+c406b3a08bd253a1bcf5b3ae92da91aa3d5278f12f55945bc57b8ccec301f14d
diff --git a/obj/Debug/net9.0/matrix_3.dll b/obj/Debug/net9.0/matrix_3.dll
index 627c95c..f6c0486 100644
Binary files a/obj/Debug/net9.0/matrix_3.dll and b/obj/Debug/net9.0/matrix_3.dll differ
diff --git a/obj/Debug/net9.0/matrix_3.pdb b/obj/Debug/net9.0/matrix_3.pdb
index 576c20f..9f05a0c 100644
Binary files a/obj/Debug/net9.0/matrix_3.pdb and b/obj/Debug/net9.0/matrix_3.pdb differ
diff --git a/obj/Debug/net9.0/ref/matrix_3.dll b/obj/Debug/net9.0/ref/matrix_3.dll
index 4eaabed..38e67bc 100644
Binary files a/obj/Debug/net9.0/ref/matrix_3.dll and b/obj/Debug/net9.0/ref/matrix_3.dll differ
diff --git a/obj/Debug/net9.0/refint/matrix_3.dll b/obj/Debug/net9.0/refint/matrix_3.dll
index 4eaabed..38e67bc 100644
Binary files a/obj/Debug/net9.0/refint/matrix_3.dll and b/obj/Debug/net9.0/refint/matrix_3.dll differ