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

Hcs.Client/GostCryptography/Asn1/Ber/Asn1Enumerated.cs

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+using System;
+
+namespace GostCryptography.Asn1.Ber
+{
+    [Serializable]
+    public abstract class Asn1Enumerated : Asn1Type
+    {
+        public const int Undefined = -999;
+        public static readonly Asn1Tag Tag = new Asn1Tag(0, 0, EnumeratedTypeCode);
+
+        [NonSerialized]
+        public int Value;
+
+        public Asn1Enumerated()
+        {
+            Value = Undefined;
+        }
+
+        public Asn1Enumerated(int value)
+        {
+            Value = value;
+        }
+
+        public override void Decode(Asn1BerDecodeBuffer buffer, bool explicitTagging, int implicitLength)
+        {
+            var length = explicitTagging ? MatchTag(buffer, Tag) : implicitLength;
+            Value = (int)Asn1RunTime.DecodeIntValue(buffer, length, true);
+            buffer.TypeCode = EnumeratedTypeCode;
+        }
+
+        public override int Encode(Asn1BerEncodeBuffer buffer, bool explicitTagging)
+        {
+            var len = buffer.EncodeIntValue(Value);
+
+            if (explicitTagging)
+            {
+                len += buffer.EncodeTagAndLength(Tag, len);
+            }
+
+            return len;
+        }
+
+        public override void Encode(Asn1BerOutputStream outs, bool explicitTagging)
+        {
+            if (explicitTagging)
+            {
+                outs.EncodeTag(Tag);
+            }
+
+            outs.EncodeIntValue(Value, true);
+        }
+
+        public virtual bool Equals(int value)
+        {
+            return (Value == value);
+        }
+
+        public override bool Equals(object value)
+        {
+            var enumerated = value as Asn1Enumerated;
+
+            return (enumerated != null && Value == enumerated.Value);
+        }
+
+        public override int GetHashCode()
+        {
+            return Value.GetHashCode();
+        }
+
+        public virtual int ParseValue(string value)
+        {
+            return -1;
+        }
+
+        public override string ToString()
+        {
+            return null;
+        }
+    }
+}