--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Implab.ServiceHost/Unity/ConfigurationContext.cs	Sun Apr 22 15:29:10 2018 +0300
@@ -0,0 +1,81 @@
+using System;
+using System.Collections.Generic;
+using System.Text.RegularExpressions;
+using Implab.Diagnostics;
+
+namespace Implab.ServiceHost.Unity {
+    using System.Linq;
+    using System.Text;
+    using static Trace<ConfigurationContext>;
+
+    public class ConfigurationContext {
+        Regex _nsRx = new Regex(@"^\w+(\.\w+)*$", RegexOptions.Compiled);
+        readonly LinkedList<string> m_namespases = new LinkedList<string>();
+
+        LinkedListNode<string> m_insertAt;
+
+        public ConfigurationContext() {
+            m_insertAt = new LinkedListNode<string>(string.Empty);
+            m_namespases.AddFirst(m_insertAt);
+        }
+
+        public void AddNamespace(string ns) {
+            Safe.ArgumentMatch(ns, nameof(ns), _nsRx);
+            if (m_insertAt != null)
+                m_namespases.AddAfter(m_insertAt, ns);
+            else
+                m_namespases.AddFirst(ns);
+        }
+
+        public Type Resolve(TypeReference reference) {
+            Safe.ArgumentNotNull(reference, nameof(reference));
+
+            var args = reference.IsGeneric && !reference.IsOpenGeneric ? reference.GenericParameters?.Select(Resolve).ToArray() : null;
+            var argc = reference.IsGeneric ? reference.GenericParameters.Length : 0;
+
+            foreach (var ns in m_namespases) {
+                var typeName = FormatName(new [] { ns, reference.Namespace, reference.TypeName}, argc, args, reference.IsArray);
+
+                var resolved = Type.GetType(typeName, false);
+                if (resolved != null) {
+                    Log("Probe succeed {0} in '{1}': {2} -> {3}", reference, ns, typeName, resolved.FullName);
+                    return resolved;
+                } else {
+                    Log("Probe failed {0} in '{1}': {2}", reference, ns, typeName);
+                }
+            }
+
+            throw new Exception($"Failed to resolve: {reference}");
+        }
+
+        string FormatName(string[] parts, int argc, Type[] args, bool isArray) {
+            var builder = new StringBuilder();
+            
+            builder.Append(String.Join(".", parts.Where(x => !string.IsNullOrEmpty(x))));
+            if (argc > 0) {
+                builder.Append('`');
+                builder.Append(argc);
+            }
+
+            if (args!= null && args.Length > 0) {
+                builder.Append('[');
+                builder.Append(string.Join(",", args.Select(x => x.FullName)));
+                builder.Append(']');
+            }
+
+            if(isArray)
+                builder.Append("[]");
+
+                return builder.ToString();
+        }
+
+        public Type Resolve(string typeReference) {
+            return Resolve(TypeReference.Parse(typeReference));
+        }
+
+        public void Register(ServiceElement descriptor) {
+
+        }
+
+    }
+}
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