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

Hcs.Client/GostCryptography/Asn1/Ber/Asn1Utf8String.cs

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+using System;
+using System.IO;
+using System.Text;
+
+namespace GostCryptography.Asn1.Ber
+{
+    [Serializable]
+    public class Asn1Utf8String : Asn1CharString
+    {
+        public static readonly Asn1Tag Tag = new Asn1Tag(0, 0, Utf8StringTypeCode);
+
+        public Asn1Utf8String()
+            : base(Utf8StringTypeCode)
+        {
+        }
+
+        public Asn1Utf8String(string data)
+            : base(data, Utf8StringTypeCode)
+        {
+        }
+
+        private byte[] AllocByteArray(int nbytes)
+        {
+            return new byte[nbytes];
+        }
+
+        public override void Decode(Asn1BerDecodeBuffer buffer, bool explicitTagging, int implicitLength)
+        {
+            var num = explicitTagging ? MatchTag(buffer, Tag) : implicitLength;
+            var str = new Asn1OctetString();
+            str.Decode(buffer, false, num);
+
+            Value = Encoding.UTF8.GetString(str.Value, 0, str.Value.Length);
+
+            if (explicitTagging && (num == Asn1Status.IndefiniteLength))
+            {
+                MatchTag(buffer, Asn1Tag.Eoc);
+            }
+        }
+
+        public override int Encode(Asn1BerEncodeBuffer buffer, bool explicitTagging)
+        {
+            var len = 0;
+
+            try
+            {
+                var bytes = Encoding.UTF8.GetBytes(Value);
+                len = bytes.Length;
+                buffer.Copy(bytes);
+            }
+            catch (IOException exception)
+            {
+                Console.Out.WriteLine("This JVM does not support UTF-8 encoding");
+                Asn1Util.WriteStackTrace(exception, Console.Error);
+            }
+
+            if (explicitTagging)
+            {
+                len += buffer.EncodeTagAndLength(Tag, len);
+            }
+
+            return len;
+        }
+
+        public override void Encode(Asn1BerOutputStream outs, bool explicitTagging)
+        {
+            try
+            {
+                var bytes = Encoding.UTF8.GetBytes(Value);
+
+                if (explicitTagging)
+                {
+                    outs.EncodeTag(Tag);
+                }
+
+                outs.EncodeLength(bytes.Length);
+                outs.Write(bytes);
+            }
+            catch (IOException exception)
+            {
+                Console.Out.WriteLine("This JVM does not support UTF-8 encoding");
+                Asn1Util.WriteStackTrace(exception, Console.Error);
+            }
+        }
+
+        private byte[] ReAllocByteArray(byte[] ba1, int nbytes)
+        {
+            var destinationArray = new byte[nbytes];
+
+            if (ba1 != null)
+            {
+                Array.Copy(ba1, 0, destinationArray, 0, ba1.Length);
+            }
+
+            return destinationArray;
+        }
+    }
+}