Merge branch 'FIX'

Extensions.cs

@@ -248,6 +248,18 @@ namespace ln.types
             return slice;
         }
 
+        public static string ToHexString(this byte[] bytes)
+        {
+            StringBuilder stringBuilder = new StringBuilder();
+
+            for (int n = 0; n < bytes.Length; n ++)
+            {
+                stringBuilder.AppendFormat("{0:X2}", bytes[n]);
+            }
+
+            return stringBuilder.ToString();
+        }
+
         public static string HexDump(this byte[] bytes)
         {
             StringBuilder stringBuilder = new StringBuilder();

btree/BTreeValueList.cs

@@ -99,6 +99,14 @@ namespace ln.types.btree
             return false;
         }
 
+        public int Count(K key)
+        {
+            List<V> _values = null;
+            if ((!bTree.TryGet(key, ref _values)) || (_values.Count == 0))
+                return 0;
+            return _values.Count;
+        }
+
         public IEnumerable<K> Keys => bTree.Keys;
         public IEnumerable<V> Values => bTree.Values.SelectMany(vl => vl);
     }