Add migrated to .NET 8.0 variant of Hcs.Client

Hcs.ClientNet/GostXades/XadesBesValidationException.cs

@@ -0,0 +1,25 @@
+using System;
+using System.Runtime.Serialization;
+
+namespace GostXades
+{
+    [Serializable]
+    public class XadesBesValidationException : Exception
+    {
+        public XadesBesValidationException()
+        {
+        }
+
+        public XadesBesValidationException(string message) : base(message)
+        {
+        }
+
+        public XadesBesValidationException(string message, Exception inner) : base(message, inner)
+        {
+        }
+
+        protected XadesBesValidationException(SerializationInfo info, StreamingContext context) : base(info, context)
+        {
+        }
+    }
+}