diff --git a/Program.cs b/Program.cs
index 7abeab1..824e56e 100644
--- a/Program.cs
+++ b/Program.cs
@@ -2,8 +2,42 @@
 
 class Program
 {
-    static void Main(string[] args)
-    {
-        Console.WriteLine("Hello, World!");
+    static void Main(string[] args) {
+        Console.Clear();
+        int scelta = -1;
+        do {
+            Console.WriteLine("Scegliere un'opzione:");
+            Console.WriteLine("1. Trova matrici quadrate nulle");
+            Console.WriteLine("0. Esci");
+            Console.Write("Scelta: ");
+
+            try {
+                scelta = Convert.ToInt32(Console.ReadLine());
+
+                switch (scelta) {
+                    case 0:
+                        break;
+                    case 1:
+                        Pausa();
+                        break;
+                    default:
+                        Console.WriteLine("Errore: scelta non valida.");
+                        Pausa();
+                        break;
+                }
+
+            }
+            catch (FormatException) {
+                Console.WriteLine("Errore: scelta non valida.");
+                Pausa();
+            }
+
+        }
+        while (scelta != 0);
+    }
+
+    static void Pausa() {
+        Console.WriteLine("Premere un tasto per continuare. . .");
+        Console.ReadKey();
     }
 }
diff --git a/obj/Debug/net9.0/.NETCoreApp,Version=v9.0.AssemblyAttributes.cs b/obj/Debug/net9.0/.NETCoreApp,Version=v9.0.AssemblyAttributes.cs
new file mode 100644
index 0000000..9e76325
--- /dev/null
+++ b/obj/Debug/net9.0/.NETCoreApp,Version=v9.0.AssemblyAttributes.cs
@@ -0,0 +1,4 @@
+// <autogenerated />
+using System;
+using System.Reflection;
+[assembly: global::System.Runtime.Versioning.TargetFrameworkAttribute(".NETCoreApp,Version=v9.0", FrameworkDisplayName = ".NET 9.0")]
diff --git a/obj/Debug/net9.0/vacanzeEstive_sezione2.AssemblyInfo.cs b/obj/Debug/net9.0/vacanzeEstive_sezione2.AssemblyInfo.cs
new file mode 100644
index 0000000..4031e56
--- /dev/null
+++ b/obj/Debug/net9.0/vacanzeEstive_sezione2.AssemblyInfo.cs
@@ -0,0 +1,22 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by a tool.
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+using System;
+using System.Reflection;
+
+[assembly: System.Reflection.AssemblyCompanyAttribute("vacanzeEstive_sezione2")]
+[assembly: System.Reflection.AssemblyConfigurationAttribute("Debug")]
+[assembly: System.Reflection.AssemblyFileVersionAttribute("1.0.0.0")]
+[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0+0f979af2d96a8dff513ac6474c5c8e3c7bcd1fb5")]
+[assembly: System.Reflection.AssemblyProductAttribute("vacanzeEstive_sezione2")]
+[assembly: System.Reflection.AssemblyTitleAttribute("vacanzeEstive_sezione2")]
+[assembly: System.Reflection.AssemblyVersionAttribute("1.0.0.0")]
+
+// Generated by the MSBuild WriteCodeFragment class.
+
diff --git a/obj/Debug/net9.0/vacanzeEstive_sezione2.AssemblyInfoInputs.cache b/obj/Debug/net9.0/vacanzeEstive_sezione2.AssemblyInfoInputs.cache
new file mode 100644
index 0000000..ebbbbcf
--- /dev/null
+++ b/obj/Debug/net9.0/vacanzeEstive_sezione2.AssemblyInfoInputs.cache
@@ -0,0 +1 @@
+220dabe602bbe8b64032d5752b075c9dcd5ebdb82403a4a7ecfe7e3d7b268563
diff --git a/obj/Debug/net9.0/vacanzeEstive_sezione2.GeneratedMSBuildEditorConfig.editorconfig b/obj/Debug/net9.0/vacanzeEstive_sezione2.GeneratedMSBuildEditorConfig.editorconfig
new file mode 100644
index 0000000..0322274
--- /dev/null
+++ b/obj/Debug/net9.0/vacanzeEstive_sezione2.GeneratedMSBuildEditorConfig.editorconfig
@@ -0,0 +1,15 @@
+is_global = true
+build_property.TargetFramework = net9.0
+build_property.TargetPlatformMinVersion = 
+build_property.UsingMicrosoftNETSdkWeb = 
+build_property.ProjectTypeGuids = 
+build_property.InvariantGlobalization = 
+build_property.PlatformNeutralAssembly = 
+build_property.EnforceExtendedAnalyzerRules = 
+build_property._SupportedPlatformList = Linux,macOS,Windows
+build_property.RootNamespace = vacanzeEstive_sezione2
+build_property.ProjectDir = /home/Verde/git/vacanzeEstive_sezione2/
+build_property.EnableComHosting = 
+build_property.EnableGeneratedComInterfaceComImportInterop = 
+build_property.EffectiveAnalysisLevelStyle = 9.0
+build_property.EnableCodeStyleSeverity = 
diff --git a/obj/Debug/net9.0/vacanzeEstive_sezione2.GlobalUsings.g.cs b/obj/Debug/net9.0/vacanzeEstive_sezione2.GlobalUsings.g.cs
new file mode 100644
index 0000000..8578f3d
--- /dev/null
+++ b/obj/Debug/net9.0/vacanzeEstive_sezione2.GlobalUsings.g.cs
@@ -0,0 +1,8 @@
+// <auto-generated/>
+global using global::System;
+global using global::System.Collections.Generic;
+global using global::System.IO;
+global using global::System.Linq;
+global using global::System.Net.Http;
+global using global::System.Threading;
+global using global::System.Threading.Tasks;
diff --git a/obj/Debug/net9.0/vacanzeEstive_sezione2.assets.cache b/obj/Debug/net9.0/vacanzeEstive_sezione2.assets.cache
new file mode 100644
index 0000000..b39349c
Binary files /dev/null and b/obj/Debug/net9.0/vacanzeEstive_sezione2.assets.cache differ