Aggiunta equality x check periodo

EgwCoreLib.Utils/DtUtils.cs

@@ -65,8 +65,8 @@
                         break;
 
                     case DtUtils.PeriodSet.LastYear:
-                        this.Inizio = new DateTime(oggi.Year-1, 1, 1);
-                        this.Fine = new DateTime(oggi.Year , 1, 1);
+                        this.Inizio = new DateTime(oggi.Year - 1, 1, 1);
+                        this.Fine = new DateTime(oggi.Year, 1, 1);
                         break;
 
                     case DtUtils.PeriodSet.LastWeek:
@@ -107,9 +107,36 @@
             #region Public Properties
 
             public DateTime Fine { get; set; } = DateTime.Today.AddDays(+1);
+
             public DateTime Inizio { get; set; } = DateTime.Today;
 
             #endregion Public Properties
+
+            #region Public Methods
+
+            public override bool Equals(object? obj)
+            {
+                if (obj == null)
+                    return false;
+
+                if (!(obj is Periodo item))
+                    return false;
+
+                if (Inizio != item.Inizio)
+                    return false;
+
+                if (Fine != item.Fine)
+                    return false;
+
+                return true;
+            }
+
+            public override int GetHashCode()
+            {
+                return base.GetHashCode();
+            }
+
+            #endregion Public Methods
         }
 
         #endregion Public Classes