diff --git a/.gitignore b/.gitignore
index d0518a7..e0939da 100644
--- a/.gitignore
+++ b/.gitignore
@@ -25,3 +25,4 @@ build.out/
 
 # eof
 src/.idea
+*.nupkg
diff --git a/src/Our.ModelsBuilder/Building/CodeCompilationsArgs.cs b/src/Our.ModelsBuilder/Building/CodeCompilationsArgs.cs
new file mode 100644
index 0000000..21d8fdd
--- /dev/null
+++ b/src/Our.ModelsBuilder/Building/CodeCompilationsArgs.cs
@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using Microsoft.CodeAnalysis.CSharp;
+
+namespace Our.ModelsBuilder.Building
+{
+    public class CodeCompilationsArgs : EventArgs
+    {
+        public LanguageVersion OptionsLanguageVersion { get; }
+
+        public CodeCompilationsArgs(LanguageVersion optionsLanguageVersion, Dictionary<string, string> dictionary)
+        {
+            OptionsLanguageVersion = optionsLanguageVersion;
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/Our.ModelsBuilder/Building/CodeGenerationArgs.cs b/src/Our.ModelsBuilder/Building/CodeGenerationArgs.cs
new file mode 100644
index 0000000..2ca22ea
--- /dev/null
+++ b/src/Our.ModelsBuilder/Building/CodeGenerationArgs.cs
@@ -0,0 +1,17 @@
+using System;
+using Our.ModelsBuilder.Options;
+
+namespace Our.ModelsBuilder.Building
+{
+    public class CodeGenerationArgs : EventArgs
+    {
+        public ICodeFactory CodeFactory;
+        public ModelsBuilderOptions Options;
+
+        public CodeGenerationArgs(ICodeFactory codeFactory, ModelsBuilderOptions options)
+        {
+            CodeFactory = codeFactory;
+            Options = options;
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/Our.ModelsBuilder/Building/Generator.cs b/src/Our.ModelsBuilder/Building/Generator.cs
index 879ef50..6229671 100644
--- a/src/Our.ModelsBuilder/Building/Generator.cs
+++ b/src/Our.ModelsBuilder/Building/Generator.cs
@@ -11,13 +11,22 @@ public class Generator
     {
         private readonly ICodeFactory _codeFactory;
         private readonly ModelsBuilderOptions _options;
-
+        public static EventHandler<CodeGenerationArgs> CustomActionOnGeneration;
+        protected virtual void OnGeneration(CodeGenerationArgs e)
+        {
+            CustomActionOnGeneration?.Invoke(this, e);
+        }
+        public static EventHandler<CodeCompilationsArgs> CustomActionOnCompiliation;
+        protected virtual void OnCompiliation(CodeCompilationsArgs e)
+        {
+            CustomActionOnCompiliation?.Invoke(this, e);
+        }
         public Generator(ICodeFactory codeFactory, ModelsBuilderOptions options)
         {
             _codeFactory = codeFactory;
             _options = options;
         }
-
+        
         public void GenerateModels(string modelsDirectory, string modelsNamespace, string bin)
         {
             if (!Directory.Exists(modelsDirectory))
@@ -35,7 +44,7 @@ public void GenerateModels(string modelsDirectory, string modelsNamespace, strin
                 var filename = Path.Combine(modelsDirectory, name + ".generated.cs");
                 File.WriteAllText(filename, code);
             });
-
+            OnGeneration(new CodeGenerationArgs(_codeFactory,_options));
             // the idea was to calculate the current hash and to add it as an extra file to the compilation,
             // in order to be able to detect whether a DLL is consistent with an environment - however the
             // environment *might not* contain the local partial files, and thus it could be impossible to
@@ -46,17 +55,19 @@ public void GenerateModels(string modelsDirectory, string modelsNamespace, strin
 [assembly:ModelsBuilderAssembly(SourceHash = ""{currentHash}"")]
 ";
             */
-
+        
             if (bin != null)
             {
                 // build
                 foreach (var file in Directory.GetFiles(modelsDirectory, "*.generated.cs"))
                     files[file] = File.ReadAllText(file);
                 var compiler = new Compiler(_options.LanguageVersion);
+                OnCompiliation(new CodeCompilationsArgs(_options.LanguageVersion, files));
                 // FIXME what is the name of the DLL as soon as we accept several namespaces = an option?
                 compiler.Compile(codeModel.AssemblyName, files, bin);
+               
             }
-
+            
             OutOfDateModelsStatus.Clear();
         }
 
diff --git a/src/Our.ModelsBuilder/Our.ModelsBuilder.csproj b/src/Our.ModelsBuilder/Our.ModelsBuilder.csproj
index 3801a81..4dec7f2 100644
--- a/src/Our.ModelsBuilder/Our.ModelsBuilder.csproj
+++ b/src/Our.ModelsBuilder/Our.ModelsBuilder.csproj
@@ -48,6 +48,8 @@
     <Compile Include="..\SolutionInfo.cs">
       <Link>Properties\SolutionInfo.cs</Link>
     </Compile>
+    <Compile Include="Building\CodeCompilationsArgs.cs" />
+    <Compile Include="Building\CodeGenerationArgs.cs" />
     <Compile Include="Building\CodeModel.cs" />
     <Compile Include="Building\CodeModelBuilder.cs" />
     <Compile Include="Building\CodeModelData.cs" />
diff --git a/src/Our.ModelsBuilder/ReferencedAssemblies.cs b/src/Our.ModelsBuilder/ReferencedAssemblies.cs
index 05fda0c..0fd5495 100644
--- a/src/Our.ModelsBuilder/ReferencedAssemblies.cs
+++ b/src/Our.ModelsBuilder/ReferencedAssemblies.cs
@@ -9,7 +9,7 @@
 
 namespace Our.ModelsBuilder
 {
-    internal static class ReferencedAssemblies
+    public sealed class ReferencedAssemblies
     {
         private static readonly Lazy<IEnumerable<string>> LazyLocations;
         private static readonly Lazy<IEnumerable<PortableExecutableReference>> LazyReferences;