Add migrated to .NET 8.0 variant of Hcs.Client

Hcs.ClientNet/GostXades/Helpers/CollectionHelper.cs

@@ -0,0 +1,13 @@
+using System.Collections;
+using System.Linq;
+
+namespace GostXades.Helpers
+{
+    public static class CollectionHelper
+    {
+        public static bool IsNotEmpty(this IEnumerable enumerable)
+        {
+            return enumerable != null && enumerable.OfType<object>().Any();
+        }
+    }
+}