diff --git a/LightweightIocContainer.FactoryGenerator/FactoryGenerator.cs b/LightweightIocContainer.FactoryGenerator/FactoryGenerator.cs
new file mode 100644
index 0000000..f969dff
--- /dev/null
+++ b/LightweightIocContainer.FactoryGenerator/FactoryGenerator.cs
@@ -0,0 +1,151 @@
+// Author: Simon.Gockner
+// Created: 2025-12-01
+// Copyright(c) 2025 SimonG. All Rights Reserved.
+
+using System.Collections.Immutable;
+using System.Text;
+using Microsoft.CodeAnalysis;
+using Microsoft.CodeAnalysis.CSharp;
+using Microsoft.CodeAnalysis.CSharp.Syntax;
+
+namespace LightweightIocContainer.FactoryGenerator;
+
+[Generator]
+public class FactoryGenerator : IIncrementalGenerator
+{
+    private const string EXTENSION_CLASS_NAME = "FactoryExtensions";
+    private const string BUILDER_CLASS_NAME = "GeneratedFactoryBuilder";
+    
+    private const string GENERATED_FILE_HEADER = "//---GENERATED by FactoryGenerator! DO NOT EDIT!---";
+    private const string INDENT = "    ";
+    
+    public void Initialize(IncrementalGeneratorInitializationContext context)
+    {
+        string? classNamespace = typeof(FactoryGenerator).Namespace;
+        context.RegisterPostInitializationOutput(c => c.AddSource($"{EXTENSION_CLASS_NAME}.g.cs", GenerateFactoryExtensionsClass(classNamespace, EXTENSION_CLASS_NAME)));
+
+        IncrementalValuesProvider<ITypeSymbol?> syntaxProvider = context.SyntaxProvider.CreateSyntaxProvider(IsCallToGenerateFactory, GetTypeArgument);
+        context.RegisterSourceOutput(syntaxProvider.Collect(), GenerateTypeDependentClasses);
+    }
+
+    private string GenerateFactoryExtensionsClass(string? classNamespace, string className)
+    {
+        StringBuilder stringBuilder = new();
+        
+        stringBuilder.AppendLine(GENERATED_FILE_HEADER);
+        stringBuilder.AppendLine();
+
+        stringBuilder.AppendLine("using LightweightIocContainer.Interfaces.Registrations;");
+        stringBuilder.AppendLine("using LightweightIocContainer.Interfaces.Registrations.Fluent;");
+        stringBuilder.AppendLine("using LightweightIocContainer.Registrations;");
+        stringBuilder.AppendLine();
+        
+        if (!string.IsNullOrEmpty(classNamespace))
+        {
+            stringBuilder.AppendLine($"namespace {classNamespace};");
+            stringBuilder.AppendLine();
+        }
+        
+        stringBuilder.AppendLine($"public static class {className}");;
+        stringBuilder.AppendLine("{");
+        
+        stringBuilder.AppendLine($"{INDENT}public static IRegistrationBase WithGeneratedFactory<TFactory>(this IRegistrationBase registration)");
+        stringBuilder.AppendLine($"{INDENT}{{");
+        stringBuilder.AppendLine($"{INDENT}{INDENT}TFactory factory = Builder.Create<TFactory>();");
+        stringBuilder.AppendLine();
+        stringBuilder.AppendLine($"{INDENT}{INDENT}if (registration is not RegistrationBase registrationBase)");
+        stringBuilder.AppendLine($"{INDENT}{INDENT}{INDENT}throw new InvalidOperationException(\"The registration must be of type RegistrationBase to add a generated factory.\");");
+        stringBuilder.AppendLine();
+        stringBuilder.AppendLine($"{INDENT}{INDENT}registrationBase.AddGeneratedFactory<TFactory>(factory);");
+        stringBuilder.AppendLine();
+        stringBuilder.AppendLine($"{INDENT}{INDENT}return registrationBase;");
+        stringBuilder.AppendLine($"{INDENT}}}");
+        
+        stringBuilder.AppendLine("}");
+        
+        return stringBuilder.ToString();
+    }
+
+    private bool IsCallToGenerateFactory(SyntaxNode node, CancellationToken cancellationToken)
+    {
+        if (!node.IsKind(SyntaxKind.GenericName) || node is not GenericNameSyntax genericNameSyntax)
+            return false;
+
+        if (!genericNameSyntax.ToString().StartsWith("WithGeneratedFactory"))
+            return false;
+
+        if (genericNameSyntax.TypeArgumentList.Arguments[0] is not IdentifierNameSyntax)
+            return false;
+
+        return true;
+    }
+    
+    private ITypeSymbol? GetTypeArgument(GeneratorSyntaxContext syntaxContext, CancellationToken cancellationToken)
+    {
+        if (syntaxContext.Node is not GenericNameSyntax genericNameSyntax)
+            return null;
+        
+        if (genericNameSyntax.TypeArgumentList.Arguments[0] is not IdentifierNameSyntax identifierNameSyntax)
+            return null;
+
+        if (syntaxContext.SemanticModel.GetSymbolInfo(identifierNameSyntax).Symbol is not ITypeSymbol typeSymbol)
+            return null;
+
+        return typeSymbol;
+    }
+    
+    private void GenerateTypeDependentClasses(SourceProductionContext context, ImmutableArray<ITypeSymbol?> types)
+    {
+        string? classNamespace = typeof(FactoryGenerator).Namespace;
+        context.AddSource($"{BUILDER_CLASS_NAME}.g.cs", GenerateBuilderClassSourceCode(classNamespace, types));
+    }
+
+    private string GenerateBuilderClassSourceCode(string? classNamespace, ImmutableArray<ITypeSymbol?> types)
+    {
+        StringBuilder stringBuilder = new();
+
+        stringBuilder.AppendLine(GENERATED_FILE_HEADER);
+        stringBuilder.AppendLine();
+
+        foreach (string typeNamespace in GetNamespacesOfTypes(types)) 
+            stringBuilder.AppendLine($"using {typeNamespace};");
+        
+        stringBuilder.AppendLine();
+
+        if (classNamespace is not null)
+        {
+            stringBuilder.AppendLine($"namespace {classNamespace};");
+            stringBuilder.AppendLine();
+        }
+        
+        stringBuilder.AppendLine("public static class Builder");
+        stringBuilder.AppendLine("{");
+        stringBuilder.AppendLine($"{INDENT}public static TFactory Create<TFactory>()");
+        stringBuilder.AppendLine($"{INDENT}{{");
+
+        foreach (ITypeSymbol? type in types)
+        {
+            if (type is null)
+                continue;
+            
+            stringBuilder.AppendLine($"{INDENT}{INDENT}if (typeof(TFactory) == typeof({type.Name}))");
+            stringBuilder.AppendLine($"{INDENT}{INDENT}{{");
+            stringBuilder.AppendLine($"{INDENT}{INDENT}{INDENT}return (TFactory) (object) new Generated{type.Name}();");
+            stringBuilder.AppendLine($"{INDENT}{INDENT}}}");
+            stringBuilder.AppendLine();
+        }
+        
+        stringBuilder.AppendLine($"{INDENT}{INDENT}throw new Exception(\"Invalid type.\");");
+        
+        stringBuilder.AppendLine($"{INDENT}}}");
+        stringBuilder.AppendLine("}");
+
+        return stringBuilder.ToString();
+    }
+
+    private IEnumerable<string> GetNamespacesOfTypes(ImmutableArray<ITypeSymbol?> types) =>
+        types.OfType<ITypeSymbol>()
+            .Select(s => s.ContainingNamespace.IsGlobalNamespace ? null : s.ContainingNamespace.ToString())
+            .OfType<string>()
+            .Distinct();
+}
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