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Basic formatting applied. Unnecessary comments have been removed. Suspicious code is covered by TODO.

Hcs.Client/GostXades/Helpers/EnumerableHelper.cs

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+using System.Collections.Generic;
+using System.Linq;
+
+namespace Hcs.GostXades.Helpers
+{
+    public static class EnumerableHelper
+    {
+        public static bool AreSequenceEquals(IEnumerable<string> first, IEnumerable<string> second)
+        {
+            var sortedFirst = first.OrderBy(x => x).ToArray();
+            var sortedSecond = second.OrderBy(x => x).ToArray();
+            return ArrayHelper.AreEquals(sortedFirst, sortedSecond);
+        }
+    }
+}