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

Hcs.Client/GostCryptography/Asn1/Ber/Asn1CharRange.cs

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+using GostCryptography.Properties;
+
+namespace GostCryptography.Asn1.Ber
+{
+    public class Asn1CharRange : Asn1CharSet
+    {
+        private readonly int _lower;
+        private readonly int _upper;
+
+        public Asn1CharRange(int lower, int upper)
+            : base((upper - lower) + 1)
+        {
+            _lower = lower;
+            _upper = upper;
+        }
+
+        public override int MaxValue
+        {
+            get { return _upper; }
+        }
+
+        public override int GetCharAtIndex(int index)
+        {
+            index += _lower;
+
+            if (index > _upper)
+            {
+                throw ExceptionUtility.CryptographicException(Resources.Asn1ConsVioException, "Character index", index);
+            }
+
+            return index;
+        }
+
+        public override int GetCharIndex(int charValue)
+        {
+            var num = charValue - _lower;
+
+            if (num < 0)
+            {
+                throw ExceptionUtility.CryptographicException(Resources.Asn1ConsVioException, "Character index", charValue);
+            }
+
+            return num;
+        }
+    }
+}