last ...

Extensions/CommonExtensions.cs

@@ -1179,6 +1179,13 @@ namespace xCommons.Extensions
             var result = DateTimeOffset.FromUnixTimeMilliseconds(timestamp);
             return result.DateTime;
         }
+        public static DateTime FromTimestamp(this string source)
+        {
+            //
+            var timestamp = Int64.Parse(source);
+            var time = timestamp.FromTimestamp();
+            return time;
+        }
 
         /// <summary>
         /// Check a Date Time is Expired or not
@@ -1188,7 +1195,7 @@ namespace xCommons.Extensions
         public static bool IsExPired(this DateTime source)
         {
             //
-            if (source == null)
+            if (source.IsNull())
             {
                 return true;
             }
@@ -1202,7 +1209,14 @@ namespace xCommons.Extensions
         }
         public static bool IsExpired(this long source)
         {
-            return source.FromTimestamp().IsExPired();
+            var time = source.FromTimestamp();
+            return time.IsExPired();
+        }
+        public static bool IsExpired(this string source)
+        {
+            //
+            var time = DateTime.Parse(source);
+            return time.IsExPired();
         }
 
         /// <summary>