diff --git a/Stylet/StyletIoC.cs b/Stylet/StyletIoC.cs
index ffba842..cabbd33 100644
--- a/Stylet/StyletIoC.cs
+++ b/Stylet/StyletIoC.cs
@@ -32,6 +32,7 @@ namespace Stylet
         #region Main Class
 
         private Dictionary<Type, List<IRegistration>> registrations = new Dictionary<Type, List<IRegistration>>();
+        private bool compiled;
 
         public void AutoBind(Assembly assembly = null)
         {
@@ -53,12 +54,8 @@ namespace Stylet
 
         public void Compile()
         {
-            // Reset everything
-            foreach (var registrations in this.registrations.Values)
-            {
-                foreach (var registration in registrations)
-                    registration.Reset();
-            }
+            if (this.compiled)
+                throw new StyletIoCException("This StyletIoC container has already been compiled");
 
             var toRemove = new List<IRegistration>();
             foreach (var kvp in this.registrations)
@@ -88,28 +85,40 @@ namespace Stylet
                 foreach (var remove in toRemove)
                     this.registrations[kvp.Key].Remove(remove);
             }
+
+            this.compiled = true;
         }
 
         public object Get(Type type, string key = null)
         {
+            this.EnsureCompiled();
             return this.GetRegistration(type, key).Generator();
         }
 
         public T Get<T>(string key = null)
         {
+            this.EnsureCompiled();
             return (T)this.Get(typeof(T), key);
         }
 
         public IEnumerable<object> GetAll(Type type, string key = null)
         {
+            this.EnsureCompiled();
             return this.GetRegistrations(type, key).Select(x => x.Generator());
         }
 
         public IEnumerable<T> GetAll<T>(string key = null)
         {
+            this.EnsureCompiled();
             return this.GetAll(typeof(T), key).Cast<T>();
         }
 
+        private void EnsureCompiled()
+        {
+            if (!this.compiled)
+                throw new StyletIocNotCompiledException("You need to run Compile() after adding bindings, before fetching any");
+        }
+
         private bool CanResolve(Type type)
         {
             return this.registrations.ContainsKey(type);
@@ -132,9 +141,6 @@ namespace Stylet
             if (registrations.Count == 0)
                 throw new StyletIoCRegistrationException(String.Format("No registrations found for service {0} with key '{1}'.", type.Name, key));
 
-            if (registrations.Any(x => x.Generator == null))
-                throw new StyletIocNotCompiledException("It looks like you've requested a registration which hasn't been compiled. Call Compile() after adding new registrations");
-
             return registrations;
         }
 
@@ -238,7 +244,6 @@ namespace Stylet
             bool WasAutoCreated { get; set; }
             void EnsureGenerator(StyletIoC service);
             Expression GetInstanceExpression(StyletIoC service);
-            void Reset();
         }
 
         private abstract class RegistrationBase : IRegistration
@@ -252,12 +257,6 @@ namespace Stylet
 
             public abstract void EnsureGenerator(StyletIoC service);
             public abstract Expression GetInstanceExpression(StyletIoC service);
-
-            public virtual void Reset()
-            {
-                this.Generator = null;
-                this.creator.Reset();
-            }
         }
 
 
@@ -319,14 +318,6 @@ namespace Stylet
                 this.instanceExpression = Expression.Constant(this.instance);
                 return this.instanceExpression;
             }
-
-            public override void Reset()
-            {
-                base.Reset();
-                this.instance = default(T);
-                this.instanceInstantiated = false;
-                this.instanceExpression = null;
-            }
         }
 
         #endregion
@@ -338,7 +329,6 @@ namespace Stylet
             string Key { get; }
             Type Type { get; }
             Expression GetInstanceExpression(StyletIoC service);
-            void Reset();
         }
 
         private abstract class CreatorBase : ICreator
@@ -346,7 +336,6 @@ namespace Stylet
             public string Key { get; protected set; }
             public virtual Type Type { get; protected set; }
             public abstract Expression GetInstanceExpression(StyletIoC service);
-            public abstract void Reset();
         }
 
         private class TypeCreator : CreatorBase
@@ -426,11 +415,6 @@ namespace Stylet
                 this.creationExpression = creator;
                 return creator;
             }
-
-            public override void Reset()
-            {
-                this.creationExpression = null;
-            }
         }
 
         private class FactoryCreator<T> : CreatorBase
@@ -450,10 +434,6 @@ namespace Stylet
                 return Expression.Invoke(expr, null);
             }
 
-            public override void Reset()
-            {
-                // Nothing to do
-            }
         }
 
         #endregion
diff --git a/StyletUnitTests/StyletUnitTests.csproj b/StyletUnitTests/StyletUnitTests.csproj
index 172c6df..a824035 100644
--- a/StyletUnitTests/StyletUnitTests.csproj
+++ b/StyletUnitTests/StyletUnitTests.csproj
@@ -32,9 +32,8 @@
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="nunit.framework, Version=2.6.2.12296, Culture=neutral, PublicKeyToken=96d09a1eb7f44a77, processorArchitecture=MSIL">
-      <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\NUnitTestAdapter.WithFramework.1.0\lib\nunit.framework.dll</HintPath>
+    <Reference Include="nunit.framework">
+      <HintPath>..\packages\NUnit.2.6.3\lib\nunit.framework.dll</HintPath>
     </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core" />
@@ -49,9 +48,6 @@
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="StyletIoCTests.cs" />
   </ItemGroup>
-  <ItemGroup>
-    <None Include="packages.config" />
-  </ItemGroup>
   <ItemGroup>
     <Service Include="{82A7F48D-3B50-4B1E-B82E-3ADA8210C358}" />
   </ItemGroup>
@@ -61,6 +57,9 @@
       <Name>Stylet</Name>
     </ProjectReference>
   </ItemGroup>
+  <ItemGroup>
+    <None Include="packages.config" />
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <Import Project="$(SolutionDir)\.nuget\NuGet.targets" Condition="Exists('$(SolutionDir)\.nuget\NuGet.targets')" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it.