diff --git a/TestApp/Program.cs b/TestApp/Program.cs
index 168c4ce..4f0c0ed 100644
--- a/TestApp/Program.cs
+++ b/TestApp/Program.cs
@@ -1,4 +1,5 @@
-using ZeroLevel;
+using System;
+using ZeroLevel;
 
 namespace TestApp
 {
diff --git a/TestApp/TestApp.csproj b/TestApp/TestApp.csproj
index c638033..c13cbb7 100644
--- a/TestApp/TestApp.csproj
+++ b/TestApp/TestApp.csproj
@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
diff --git a/ZeroLevel.SqlServer/ZeroLevel.SqlServer.csproj b/ZeroLevel.SqlServer/ZeroLevel.SqlServer.csproj
index a1a1b35..4be0b46 100644
--- a/ZeroLevel.SqlServer/ZeroLevel.SqlServer.csproj
+++ b/ZeroLevel.SqlServer/ZeroLevel.SqlServer.csproj
@@ -9,7 +9,7 @@
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>ZeroLevel.SqlServer</RootNamespace>
     <AssemblyName>ZeroLevel.SqlServer</AssemblyName>
-    <TargetFrameworkVersion>v4.7</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.7.2</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
     <TargetFrameworkProfile />
   </PropertyGroup>
diff --git a/ZeroLevel.UnitTests/SerializationTests.cs b/ZeroLevel.UnitTests/SerializationTests.cs
index d4b710e..4a0326f 100644
--- a/ZeroLevel.UnitTests/SerializationTests.cs
+++ b/ZeroLevel.UnitTests/SerializationTests.cs
@@ -62,6 +62,51 @@ namespace ZeroLevel.Serialization
             }
         }
 
+        private void MakeDictionaryTest<TKey, TValue>(Dictionary<TKey, TValue> value
+            , Func<TKey, TKey, bool> keyComparator = null
+            , Func<TValue, TValue, bool> valueComparator = null)
+        {
+            byte[] data;
+            Dictionary<TKey, TValue> clone;
+            // Act
+            using (var writer = new MemoryStreamWriter())
+            {
+                writer.WriteDictionary<TKey, TValue>(value);
+                data = writer.Complete();
+            }
+            using (var reader = new MemoryStreamReader(data))
+            {
+                clone = reader.ReadDictionary<TKey, TValue>();
+            }
+
+            // Assert
+            if (value == null && clone != null && !clone.Any()) return; // OK
+
+            if (value != null && clone == null) throw new Exception("Fail");
+            var original_keys = value.Keys.ToArray();
+            var clone_keys = clone.Keys.ToArray();
+
+            if (keyComparator == null)
+            {
+                Assert.True(CollectionComparsionExtensions.NoOrderingEquals(original_keys, clone_keys));
+            }
+            else
+            {
+                Assert.True(CollectionComparsionExtensions.NoOrderingEquals(original_keys, clone_keys, keyComparator));
+            }
+            foreach (var key in original_keys)
+            {
+                if (valueComparator == null)
+                {
+                    Assert.Equal(value[key], clone[key]);
+                }
+                else
+                {
+                    Assert.True(valueComparator(value[key], clone[key]));
+                }
+            }
+        }
+
         [Fact]
         public void SerializeDateTime()
         {
@@ -134,7 +179,20 @@ namespace ZeroLevel.Serialization
             MakePrimitiveTest<String>("HELLO!", comparator);
             MakePrimitiveTest<String>("𐌼𐌰𐌲 𐌲𐌻𐌴𐍃 𐌹̈𐍄𐌰𐌽, 𐌽𐌹 𐌼𐌹𐍃 𐍅𐌿 𐌽𐌳𐌰𐌽 𐌱𐍂𐌹𐌲𐌲𐌹𐌸", comparator);
         }
+        [Fact]
+        public void SerizlizeCharText()
+        {
+            // Arrange
+            var line = "abcxyzABCZА-Яа-яёЁйЙ123";
+
+            // Act
+            var bytes = line.Select(ch => MessageSerializer.SerializeCompatible<char>(ch));
+
+            // Assert
+            var testLine = new string(bytes.Select(ba => MessageSerializer.DeserializeCompatible<char>(ba)).ToArray());
 
+            Assert.Equal(line, testLine);
+        }
         [Fact]
         public void SerializeInt32()
         {
@@ -324,6 +382,24 @@ namespace ZeroLevel.Serialization
             MakeCollectionTest<String>(new string[] { "", String.Empty, null, "HELLO!", "𐌼𐌰𐌲 𐌲𐌻𐌴𐍃 𐌹̈𐍄𐌰𐌽, 𐌽𐌹 𐌼𐌹𐍃 𐍅𐌿 𐌽𐌳𐌰𐌽 𐌱𐍂𐌹𐌲𐌲𐌹𐌸" }, comparator);
         }
 
+        [Fact]
+        public void SerizlizeCollectionChar()
+        {
+            // Arrange
+            var line = "abcxyzABCZА-Яа-яёЁйЙ123";
+
+            // Act
+            var bytes_string = MessageSerializer.SerializeCompatible<string>(line);
+            var bytes_charenum = MessageSerializer.SerializeCompatible<IEnumerable<char>>(line);
+
+            // Assert
+            var test_line1 = MessageSerializer.DeserializeCompatible<string>(bytes_string);
+            var test_line2 = new string(MessageSerializer.DeserializeCompatible<IEnumerable<char>>(bytes_charenum).ToArray());
+
+            Assert.Equal(line, test_line1);
+            Assert.Equal(line, test_line2);
+            Assert.NotEqual(bytes_string, bytes_charenum);
+        }
 
         [Fact]
         public void SerializeCollectionInt32()
@@ -403,5 +479,36 @@ namespace ZeroLevel.Serialization
                 Assert.Equal(2049, reader.ReadInt32());
             }
         }
+
+        [Fact]
+        public void SerializeDictionaryTest()
+        {
+            var dict = new Dictionary<int, string>
+            {
+                {0, "Dear" },
+                {1, "Chaisy" },
+                {2, "Lain" }
+            };
+            MakeDictionaryTest(dict);
+        }
+
+        [Fact]
+        public void SerializeDictionaryWithComposedObjectTest()
+        {
+            var dict = new Dictionary<int, Document>
+            {
+                {0, CompositeInstanceFactory.MakeDocument() },
+                {1, CompositeInstanceFactory.MakeDocument() },
+                {2, CompositeInstanceFactory.MakeDocument() },
+                {3, CompositeInstanceFactory.MakeDocument() }
+            };
+            var comparator = new Func<Document, Document, bool>((left, right) =>
+            {
+                var l_bin = MessageSerializer.Serialize(left);
+                var r_bin = MessageSerializer.Serialize(right);
+                return ArrayExtensions.UnsafeEquals(l_bin, r_bin);
+            });
+            MakeDictionaryTest(dict, valueComparator: comparator);
+        }
     }
 }
diff --git a/ZeroLevel.UnitTests/ZeroLevel.UnitTests.csproj b/ZeroLevel.UnitTests/ZeroLevel.UnitTests.csproj
index 9a1dc8d..45f059c 100644
--- a/ZeroLevel.UnitTests/ZeroLevel.UnitTests.csproj
+++ b/ZeroLevel.UnitTests/ZeroLevel.UnitTests.csproj
@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <TargetFramework>netcoreapp2.2</TargetFramework>
diff --git a/ZeroLevel/Services/Semantic/Trie.cs b/ZeroLevel/Services/Semantic/Trie.cs
index fbdf92d..57b369d 100644
--- a/ZeroLevel/Services/Semantic/Trie.cs
+++ b/ZeroLevel/Services/Semantic/Trie.cs
@@ -1,4 +1,5 @@
-using System.Collections.Generic;
+using System.Collections.Concurrent;
+using System.Collections.Generic;
 using System.Threading;
 using ZeroLevel.Services.Serialization;
 
@@ -10,16 +11,14 @@ namespace ZeroLevel.Services.Semantic
         internal class TrieNode
             : IBinarySerializable
         {
-            public char Key;
             public uint? Value;
             public TrieNode Parent;
-            public List<TrieNode> Children;
+            public ConcurrentDictionary<char, TrieNode> Children;
 
             public TrieNode() { }
             public TrieNode(TrieNode parent) { Parent = parent; }
             public void Deserialize(IBinaryReader reader)
             {
-                this.Key = reader.ReadChar();
                 if (reader.ReadBoolean())
                 {
                     this.Value = reader.ReadUInt32();
@@ -28,12 +27,11 @@ namespace ZeroLevel.Services.Semantic
                 {
                     this.Value = null;
                 }
-                this.Children = reader.ReadCollection<TrieNode>();
+                this.Children = reader.ReadDictionaryAsConcurrent<char, TrieNode>();
             }
 
             public void Serialize(IBinaryWriter writer)
             {
-                writer.WriteChar(this.Key);
                 if (this.Value.HasValue)
                 {
                     writer.WriteBoolean(true);
@@ -49,7 +47,7 @@ namespace ZeroLevel.Services.Semantic
                 }
                 else
                 {
-                    writer.WriteCollection<TrieNode>(this.Children);
+                    writer.WriteDictionary<char, TrieNode>(this.Children);
                 }
             }
             internal TrieNode Append(string word, int index, bool reverse)
@@ -65,40 +63,22 @@ namespace ZeroLevel.Services.Semantic
                 {
                     if (this.Children == null)
                     {
-                        this.Children = new List<TrieNode>();
+                        this.Children = new ConcurrentDictionary<char, TrieNode>();
                     }
-                    for (int i = 0; i < Children.Count; i++)
+                    if (!this.Children.ContainsKey(word[index]))
                     {
-                        if (Children[i].Key == word[index])
-                        {
-                            return Children[i].Append(word, index + 1, reverse);
-                        }
+                        this.Children.TryAdd(word[index], new TrieNode(this));
                     }
-                    var tn = new TrieNode(reverse ? this : null) { Key = word[index] };
-                    Children.Add(tn);
-                    return tn.Append(word, index + 1, reverse);
+                    return Children[word[index]].Append(word, index + 1, reverse);
                 }
                 return null;
             }
             internal uint? GetKey(string word, int index)
             {
-                if (word.Length == index + 1)
+                if (this.Children?.ContainsKey(word[index]) ?? false)
                 {
-                    return this.Value;
-                }
-                else
-                {
-                    if (this.Children == null)
-                    {
-                        this.Children = new List<TrieNode>();
-                    }
-                    for (int i = 0; i < Children.Count; i++)
-                    {
-                        if (Children[i].Key == word[index])
-                        {
-                            return Children[i].GetKey(word, index + 1);
-                        }
-                    }
+                    if (word.Length == index + 1) return this.Children[word[index]].Value;
+                    return this.Children[word[index]].GetKey(word, index + 1);
                 }
                 return null;
             }
@@ -114,7 +94,7 @@ namespace ZeroLevel.Services.Semantic
                 {
                     foreach (var child in this.Children)
                     {
-                        child.RebuildReverseIndex(this, index);
+                        child.Value.RebuildReverseIndex(this, index);
                     }
                 }
             }
@@ -126,17 +106,22 @@ namespace ZeroLevel.Services.Semantic
                 {
                     foreach (var child in this.Children)
                     {
-                        child.DestroyReverseIndex();
+                        child.Value.DestroyReverseIndex();
                     }
                 }
             }
         }
 
-        internal List<TrieNode> _roots;
+        internal TrieNode _root;
         private int _word_index = 0;
         private bool _use_reverse_index;
 
         private Dictionary<uint, TrieNode> _reverse_index;
+
+        public Trie() : this(false)
+        {
+        }
+
         public Trie(bool reverse_index = false)
         {
             _use_reverse_index = reverse_index;
@@ -144,7 +129,7 @@ namespace ZeroLevel.Services.Semantic
             {
                 _reverse_index = new Dictionary<uint, TrieNode>();
             }
-            _roots = new List<TrieNode>();
+            _root = new TrieNode();
         }
 
         public void ToggleReverseIndex(bool enabled)
@@ -163,37 +148,13 @@ namespace ZeroLevel.Services.Semantic
         public void Append(string word)
         {
             if (word.Length == 0) return;
-            bool found = false;
-            for (int i = 0; i < _roots.Count; i++)
-            {
-                if (_roots[i].Key == word[0])
-                {
-                    var node = _roots[i].Append(word, 1, _use_reverse_index);
-                    Thread.MemoryBarrier();
-                    if (node != null)
-                    {
-                        node.Value = (uint)Interlocked.Increment(ref _word_index);
-                        if (_use_reverse_index)
-                        {
-                            _reverse_index.Add(node.Value.Value, node);
-                        }
-                    }
-                    found = true;
-                }
-            }
-            if (!found)
+            var node = _root.Append(word, 0, _use_reverse_index);
+            if (node != null)
             {
-                var tn = new TrieNode { Key = word[0] };
-                _roots.Add(tn);
-                var node = tn.Append(word, 1, _use_reverse_index);
-                Thread.MemoryBarrier();
                 node.Value = (uint)Interlocked.Increment(ref _word_index);
-                if (node != null)
+                if (_use_reverse_index)
                 {
-                    if (_use_reverse_index)
-                    {
-                        _reverse_index.Add(node.Value.Value, node);
-                    }
+                    _reverse_index.Add(node.Value.Value, node);
                 }
             }
         }
@@ -201,55 +162,27 @@ namespace ZeroLevel.Services.Semantic
         public uint? Key(string word)
         {
             if (word?.Length == 0) return null;
-            for (int i = 0; i < _roots.Count; i++)
-            {
-                if (_roots[i].Key == word[0])
-                {
-                    if (word.Length == 1)
-                    {
-                        return _roots[i].Value;
-                    }
-                    else
-                    {
-                        return _roots[i].GetKey(word, 1);
-                    }
-                }
-            }
-            return null;
+            return _root.GetKey(word, 0);
         }
 
         public bool Contains(string word)
         {
             if (word?.Length == 0) return false;
-            for (int i = 0; i < _roots.Count; i++)
-            {
-                if (_roots[i].Key == word[0])
-                {
-                    if (word.Length == 1)
-                    {
-                        return _roots[i].Value.HasValue;
-                    }
-                    else
-                    {
-                        return _roots[i].GetKey(word, 1).HasValue;
-                    }
-                }
-            }
-            return false;
+            return _root.GetKey(word, 0).HasValue;
         }
 
         public void Serialize(IBinaryWriter writer)
         {
             writer.WriteInt32(this._word_index);
             writer.WriteBoolean(this._use_reverse_index);
-            writer.WriteCollection<TrieNode>(this._roots);
+            writer.Write<TrieNode>(this._root);
         }
 
         public void Deserialize(IBinaryReader reader)
         {
             this._word_index = reader.ReadInt32();
             this._use_reverse_index = reader.ReadBoolean();
-            this._roots = reader.ReadCollection<TrieNode>();
+            this._root = reader.Read<TrieNode>();
             RebuildReverseIndex();
         }
 
@@ -261,10 +194,7 @@ namespace ZeroLevel.Services.Semantic
                 {
                     _reverse_index = new Dictionary<uint, TrieNode>();
                 }
-                foreach (var node in _roots)
-                {
-                    node.RebuildReverseIndex(null, _reverse_index);
-                }
+                _root.RebuildReverseIndex(null, _reverse_index);
             }
         }
 
@@ -275,10 +205,7 @@ namespace ZeroLevel.Services.Semantic
                 _reverse_index.Clear();
                 _reverse_index = null;
             }
-            foreach (var node in _roots)
-            {
-                node.DestroyReverseIndex();
-            }
+            _root.DestroyReverseIndex();
         }
     }
 }
diff --git a/ZeroLevel/Services/Serialization/IBinaryReader.cs b/ZeroLevel/Services/Serialization/IBinaryReader.cs
index 8235d38..cd3b538 100644
--- a/ZeroLevel/Services/Serialization/IBinaryReader.cs
+++ b/ZeroLevel/Services/Serialization/IBinaryReader.cs
@@ -1,4 +1,5 @@
 using System;
+using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.Net;
 
@@ -52,12 +53,16 @@ namespace ZeroLevel.Services.Serialization
 
         List<T> ReadCollection<T>() where T : IBinarySerializable, new();
 
+        Dictionary<TKey, TValue> ReadDictionary<TKey, TValue>();
+
+        ConcurrentDictionary<TKey, TValue> ReadDictionaryAsConcurrent<TKey, TValue>();
+
         List<string> ReadStringCollection();
 
         List<Guid> ReadGuidCollection();
 
         List<DateTime> ReadDateTimeCollection();
-
+        List<char> ReadCharCollection();
         List<Int64> ReadInt64Collection();
 
         List<Int32> ReadInt32Collection();
diff --git a/ZeroLevel/Services/Serialization/IBinaryWriter.cs b/ZeroLevel/Services/Serialization/IBinaryWriter.cs
index 8d2609c..d92764f 100644
--- a/ZeroLevel/Services/Serialization/IBinaryWriter.cs
+++ b/ZeroLevel/Services/Serialization/IBinaryWriter.cs
@@ -1,4 +1,5 @@
 using System;
+using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.IO;
 using System.Net;
@@ -51,7 +52,12 @@ namespace ZeroLevel.Services.Serialization
         void WriteCollection<T>(IEnumerable<T> collection)
             where T : IBinarySerializable;
 
+        void WriteDictionary<TKey, TValue>(Dictionary<TKey, TValue> collection);
+        void WriteDictionary<TKey, TValue>(ConcurrentDictionary<TKey, TValue> collection);
+
+
         void WriteCollection(IEnumerable<string> collection);
+        void WriteCollection(IEnumerable<char> collection);
 
         void WriteCollection(IEnumerable<Guid> collection);
 
diff --git a/ZeroLevel/Services/Serialization/MemoryStreamReader.cs b/ZeroLevel/Services/Serialization/MemoryStreamReader.cs
index 65de261..e742b45 100644
--- a/ZeroLevel/Services/Serialization/MemoryStreamReader.cs
+++ b/ZeroLevel/Services/Serialization/MemoryStreamReader.cs
@@ -1,4 +1,5 @@
 using System;
+using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.IO;
 using System.Net;
@@ -54,10 +55,10 @@ namespace ZeroLevel.Services.Serialization
                 throw new OutOfMemoryException("Array index out of bounds");
             return (byte)_stream.ReadByte();
         }
-
+        
         public char ReadChar()
         {
-            if (CheckOutOfRange(_stream, 1))
+            if (CheckOutOfRange(_stream, 2))
                 throw new OutOfMemoryException("Array index out of bounds");
             var buffer = ReadBuffer(2);
             return BitConverter.ToChar(buffer, 0);
@@ -240,6 +241,43 @@ namespace ZeroLevel.Services.Serialization
             return collection;
         }
 
+
+        public Dictionary<TKey, TValue> ReadDictionary<TKey, TValue>()
+        {
+            int count = ReadInt32();
+            var collection = new Dictionary<TKey, TValue>(count);            
+            if (count > 0)
+            {
+                TKey key;
+                TValue value;
+                for (int i = 0; i < count; i++)
+                {
+                    key = ReadCompatible<TKey>();
+                    value = ReadCompatible<TValue>();
+                    collection.Add(key, value);
+                }
+            }
+            return collection;
+        }
+
+        public ConcurrentDictionary<TKey, TValue> ReadDictionaryAsConcurrent<TKey, TValue>()
+        {
+            int count = ReadInt32();
+            var collection = new ConcurrentDictionary<TKey, TValue>();
+            if (count > 0)
+            {
+                TKey key;
+                TValue value;
+                for (int i = 0; i < count; i++)
+                {
+                    key = ReadCompatible<TKey>();
+                    value = ReadCompatible<TValue>();
+                    collection.TryAdd(key, value);
+                }
+            }
+            return collection;
+        }
+
         public T ReadCompatible<T>()
         {
             return MessageSerializer.DeserializeCompatible<T>(this);
@@ -379,7 +417,19 @@ namespace ZeroLevel.Services.Serialization
             }
             return collection;
         }
-
+        public List<char> ReadCharCollection()
+        {
+            int count = ReadInt32();
+            var collection = new List<char>(count);
+            if (count > 0)
+            {
+                for (int i = 0; i < count; i++)
+                {
+                    collection.Add(ReadChar());
+                }
+            }
+            return collection;
+        }
         public List<short> ReadShortCollection()
         {
             int count = ReadInt32();
diff --git a/ZeroLevel/Services/Serialization/MemoryStreamWriter.cs b/ZeroLevel/Services/Serialization/MemoryStreamWriter.cs
index cc78595..0cbad0d 100644
--- a/ZeroLevel/Services/Serialization/MemoryStreamWriter.cs
+++ b/ZeroLevel/Services/Serialization/MemoryStreamWriter.cs
@@ -1,4 +1,5 @@
 using System;
+using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
@@ -50,7 +51,8 @@ namespace ZeroLevel.Services.Serialization
         /// </summary>
         public void WriteChar(char val)
         {
-            _stream.Write(BitConverter.GetBytes(val), 0, 2);
+            var data = BitConverter.GetBytes(val);
+            _stream.Write(data, 0, 2);
         }
 
         /// <summary>
@@ -307,6 +309,17 @@ namespace ZeroLevel.Services.Serialization
             }
         }
 
+        public void WriteCollection(IEnumerable<char> collection)
+        {
+            WriteInt32(collection?.Count() ?? 0);
+            if (collection != null)
+            {
+                foreach (var item in collection)
+                {
+                    WriteChar(item);
+                }
+            }
+        }
         public void WriteCollection(IEnumerable<short> collection)
         {
             WriteInt32(collection?.Count() ?? 0);
@@ -417,7 +430,8 @@ namespace ZeroLevel.Services.Serialization
 
         public void WriteCompatible<T>(T item)
         {
-            WriteBytes(MessageSerializer.SerializeCompatible(item));
+            var buffer = MessageSerializer.SerializeCompatible(item);
+            _stream.Write(buffer, 0, buffer.Length);
         }
 
         public void WriteCollection(IEnumerable<decimal> collection)
@@ -432,6 +446,33 @@ namespace ZeroLevel.Services.Serialization
             }
         }
 
+
+        public void WriteDictionary<TKey, TValue>(Dictionary<TKey, TValue> collection)
+        {
+            WriteInt32(collection?.Count() ?? 0);
+            if (collection != null)
+            {
+                foreach (var item in collection)
+                {
+                    WriteCompatible(item.Key);
+                    WriteCompatible(item.Value);
+                }
+            }
+        }
+
+        public void WriteDictionary<TKey, TValue>(ConcurrentDictionary<TKey, TValue> collection)
+        {
+            WriteInt32(collection?.Count() ?? 0);
+            if (collection != null)
+            {
+                foreach (var item in collection)
+                {
+                    WriteCompatible(item.Key);
+                    WriteCompatible(item.Value);
+                }
+            }
+        }
+
         public void WriteCollection(IEnumerable<TimeSpan> collection)
         {
             WriteInt32(collection?.Count() ?? 0);
diff --git a/ZeroLevel/Services/Serialization/PrimitiveTypeSerializer.cs b/ZeroLevel/Services/Serialization/PrimitiveTypeSerializer.cs
index 1ed2671..36beba0 100644
--- a/ZeroLevel/Services/Serialization/PrimitiveTypeSerializer.cs
+++ b/ZeroLevel/Services/Serialization/PrimitiveTypeSerializer.cs
@@ -49,6 +49,7 @@ namespace ZeroLevel.Services.Serialization
 
         private static void PreloadCachee()
         {
+            _cachee.Add(typeof(char), Create<char>());
             _cachee.Add(typeof(Boolean), Create<Boolean>());
             _cachee.Add(typeof(Byte), Create<Byte>());
             _cachee.Add(typeof(Byte[]), Create<Byte[]>());
@@ -68,6 +69,7 @@ namespace ZeroLevel.Services.Serialization
             _cachee.Add(typeof(IPEndPoint), Create<IPEndPoint>());
             _cachee.Add(typeof(IPAddress), Create<IPAddress>());
 
+            _cachee.Add(typeof(IEnumerable<char>), Create<IEnumerable<char>>());
             _cachee.Add(typeof(IEnumerable<Boolean>), Create<IEnumerable<Boolean>>());
             _cachee.Add(typeof(IEnumerable<Byte>), Create<IEnumerable<Byte>>());
             _cachee.Add(typeof(IEnumerable<Byte[]>), Create<IEnumerable<Byte[]>>());
@@ -87,6 +89,7 @@ namespace ZeroLevel.Services.Serialization
             _cachee.Add(typeof(IEnumerable<IPEndPoint>), Create<IEnumerable<IPEndPoint>>());
             _cachee.Add(typeof(IEnumerable<IPAddress>), Create<IEnumerable<IPAddress>>());
 
+            _enumTypesCachee.Add(typeof(char), typeof(IEnumerable<char>));
             _enumTypesCachee.Add(typeof(Boolean), typeof(IEnumerable<Boolean>));
             _enumTypesCachee.Add(typeof(Byte), typeof(IEnumerable<Byte>));
             _enumTypesCachee.Add(typeof(Byte[]), typeof(IEnumerable<Byte[]>));
@@ -121,6 +124,11 @@ namespace ZeroLevel.Services.Serialization
                 wrapper.ReadId = wrapper.Invoker.Configure(typeof(MemoryStreamReader), "ReadUInt32").First();
                 wrapper.WriteId = wrapper.Invoker.Configure(typeof(MemoryStreamWriter), "WriteUInt32").First();
             }
+            else if (type == typeof(char))
+            {
+                wrapper.ReadId = wrapper.Invoker.Configure(typeof(MemoryStreamReader), "ReadChar").First();
+                wrapper.WriteId = wrapper.Invoker.Configure(typeof(MemoryStreamWriter), "WriteChar").First();
+            }
             else if (type == typeof(Boolean))
             {
                 wrapper.ReadId = wrapper.Invoker.Configure(typeof(MemoryStreamReader), "ReadBoolean").First();
@@ -209,6 +217,11 @@ namespace ZeroLevel.Services.Serialization
                 wrapper.ReadId = wrapper.Invoker.Configure(typeof(MemoryStreamReader), "ReadInt32Collection").First();
                 wrapper.WriteId = wrapper.Invoker.Configure(typeof(MemoryStreamWriter), CreatePredicate<Tw>()).First();
             }
+            else if (type == typeof(IEnumerable<char>))
+            {
+                wrapper.ReadId = wrapper.Invoker.Configure(typeof(MemoryStreamReader), "ReadCharCollection").First();
+                wrapper.WriteId = wrapper.Invoker.Configure(typeof(MemoryStreamWriter), CreatePredicate<Tw>()).First();
+            }
             else if (type == typeof(IEnumerable<UInt32>))
             {
                 wrapper.ReadId = wrapper.Invoker.Configure(typeof(MemoryStreamReader), "ReadUInt32Collection").First();
diff --git a/ZeroLevel/ZeroLevel.csproj b/ZeroLevel/ZeroLevel.csproj
index 4cc8295..a300a28 100644
--- a/ZeroLevel/ZeroLevel.csproj
+++ b/ZeroLevel/ZeroLevel.csproj
@@ -2,10 +2,11 @@
 
   <PropertyGroup>
     <TargetFramework>netstandard2.0</TargetFramework>
-    <Description>Infrastructure layer library</Description>
+    <Description>Fixed dictionary serialization, trie
+</Description>
     <Authors>ogoun</Authors>
     <Company>ogoun</Company>
-    <AssemblyVersion>3.0.0.6</AssemblyVersion>
+    <AssemblyVersion>3.0.0.7</AssemblyVersion>
     <PackageReleaseNotes>Added char serialization
 Added prefix tree (Trie)</PackageReleaseNotes>
     <PackageProjectUrl>https://github.com/ogoun/Zero/wiki</PackageProjectUrl>
@@ -14,8 +15,8 @@ Added prefix tree (Trie)</PackageReleaseNotes>
     <PackageIconUrl>https://raw.githubusercontent.com/ogoun/Zero/master/zero.png</PackageIconUrl>
     <RepositoryUrl>https://github.com/ogoun/Zero</RepositoryUrl>
     <RepositoryType>GitHub</RepositoryType>
-    <Version>3.0.6</Version>
-    <FileVersion>3.0.0.6</FileVersion>
+    <Version>3.0.7</Version>
+    <FileVersion>3.0.0.7</FileVersion>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">