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

Hcs.Client/GostCryptography/Asn1/Ber/Asn1CharSet.cs

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+namespace GostCryptography.Asn1.Ber
+{
+    public abstract class Asn1CharSet
+    {
+        private readonly int _aBitsPerChar;
+        private readonly int _uBitsPerChar;
+
+        protected internal Asn1CharSet(int nchars)
+        {
+            _uBitsPerChar = Asn1Integer.GetBitCount(nchars - 1);
+            _aBitsPerChar = 1;
+
+            while (_uBitsPerChar > _aBitsPerChar)
+            {
+                _aBitsPerChar = _aBitsPerChar << 1;
+            }
+        }
+
+        public abstract int MaxValue { get; }
+
+        public abstract int GetCharAtIndex(int index);
+
+        public abstract int GetCharIndex(int charValue);
+
+        public virtual int GetNumBitsPerChar(bool aligned)
+        {
+            if (!aligned)
+            {
+                return _uBitsPerChar;
+            }
+
+            return _aBitsPerChar;
+        }
+    }
+}