diff --git a/LightweightIocContainer/Interfaces/Registrations/IRegistrationBase.cs b/LightweightIocContainer/Interfaces/Registrations/IRegistrationBase.cs
index 6135eed..b90b444 100644
--- a/LightweightIocContainer/Interfaces/Registrations/IRegistrationBase.cs
+++ b/LightweightIocContainer/Interfaces/Registrations/IRegistrationBase.cs
@@ -10,7 +10,7 @@ namespace LightweightIocContainer.Interfaces.Registrations
     /// The <see cref="IRegistrationBase{TInterface}"/> that is used to register an Interface
     /// </summary>
     /// <typeparam name="TInterface">The registered Interface</typeparam>
-    public interface IRegistrationBase<TInterface> : IRegistration, IOnCreate<TInterface>, IWithParameters<TInterface>
+    public interface IRegistrationBase<TInterface> : IRegistration, IWithParameters<TInterface>
     {
         /// <summary>
         /// The Lifestyle of Instances that are created with this <see cref="IRegistrationBase{TInterface}"/>
diff --git a/LightweightIocContainer/Registrations/RegistrationBase.cs b/LightweightIocContainer/Registrations/RegistrationBase.cs
index 512fed9..8e0f617 100644
--- a/LightweightIocContainer/Registrations/RegistrationBase.cs
+++ b/LightweightIocContainer/Registrations/RegistrationBase.cs
@@ -43,25 +43,6 @@ namespace LightweightIocContainer.Registrations
         /// </summary>
         public Lifestyle Lifestyle { get; }
 
-
-        /// <summary>
-        /// This <see cref="Action{T}"/> is invoked when an instance of this type is created.
-        /// <para>Can be set in the <see cref="IIocInstaller"/> by calling <see cref="OnCreate"/></para>
-        /// </summary>
-        public Action<TInterface> OnCreateAction { get; private set; }
-
-
-        /// <summary>
-        /// Pass an <see cref="Action{T}"/> that will be invoked when an instance of this <see cref="Type"/> is created
-        /// </summary>
-        /// <param name="action">The <see cref="Action{T}"/></param>
-        /// <returns>The current instance of this <see cref="IRegistrationBase{TInterface}"/></returns>
-        public IRegistrationBase<TInterface> OnCreate(Action<TInterface> action)
-        {
-            OnCreateAction = action;
-            return this;
-        }
-
         /// <summary>
         /// An <see cref="Array"/> of parameters that are used to <see cref="IIocContainer.Resolve{T}()"/> an instance of this <see cref="IRegistration.InterfaceType"/>
         /// <para>Can be set in the <see cref="IIocInstaller"/> by calling <see cref="WithParameters(object[])"/></para>
@@ -75,7 +56,7 @@ namespace LightweightIocContainer.Registrations
         /// <param name="parameters">The parameters</param>
         /// <returns>The current instance of this <see cref="IRegistrationBase{TInterface}"/></returns>
         /// <exception cref="InvalidRegistrationException"><see cref="Parameters"/> are already set or no parameters given</exception>
-        public IRegistrationBase<TInterface> WithParameters(params object[] parameters)
+        public virtual IRegistrationBase<TInterface> WithParameters(params object[] parameters)
         {
             if (Parameters != null)
                 throw new InvalidRegistrationException($"Don't use `WithParameters()` method twice (Type: {InterfaceType}).");
@@ -94,7 +75,7 @@ namespace LightweightIocContainer.Registrations
         /// <param name="parameters">The parameters with their position</param>
         /// <returns>The current instance of this <see cref="IRegistrationBase{TInterface}"/></returns>
         /// <exception cref="InvalidRegistrationException"><see cref="Parameters"/> are already set or no parameters given</exception>
-        public IRegistrationBase<TInterface> WithParameters(params (int index, object parameter)[] parameters)
+        public virtual IRegistrationBase<TInterface> WithParameters(params (int index, object parameter)[] parameters)
         {
             if (Parameters != null)
                 throw new InvalidRegistrationException($"Don't use `WithParameters()` method twice (Type: {InterfaceType}).");