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

Hcs.Client/GostCryptography/Asn1/OidValue.cs

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+using System.Linq;
+using System.Security.Cryptography;
+
+namespace GostCryptography.Asn1
+{
+    public sealed class OidValue
+    {
+        public static readonly OidValue Null = new OidValue("", new int[] { });
+
+        private OidValue(string value, int[] items)
+        {
+            Value = value;
+            Items = items;
+        }
+
+        public static OidValue FromString(string value)
+        {
+            var items = value.Split('.').Select(int.Parse).ToArray();
+            return new OidValue(value, items);
+        }
+
+        public static OidValue FromArray(int[] items)
+        {
+            string value = string.Join(".", items);
+            return new OidValue(value, items);
+        }
+
+        public string Value { get; }
+
+        public int[] Items { get; }
+
+        public override int GetHashCode()
+        {
+            if (Items == null)
+            {
+                return 0;
+            }
+
+            var result = 1;
+
+            foreach (var item in Items)
+            {
+                result = 31 * result + item.GetHashCode();
+            }
+
+            return result;
+        }
+
+        public override bool Equals(object obj)
+        {
+            if (this == obj)
+            {
+                return true;
+            }
+
+            if (!(obj is OidValue))
+            {
+                return false;
+            }
+
+            var other = (OidValue)obj;
+
+            if (Items == other.Items)
+            {
+                return true;
+            }
+
+            if (Items == null || other.Items == null)
+            {
+                return false;
+            }
+
+            if (Items.Length != other.Items.Length)
+            {
+                return false;
+            }
+
+            for (var i = 0; i < Items.Length; ++i)
+            {
+                if (Items[i] != other.Items[i])
+                {
+                    return false;
+                }
+            }
+
+            return true;
+        }
+
+        public override string ToString()
+        {
+            return Value;
+        }
+
+        public Oid ToOid()
+        {
+            return new Oid(Value);
+        }
+    }
+}