diff --git a/Pilz.Net/Api/ApiServer.cs b/Pilz.Net/Api/ApiServer.cs
index 4845f75..2c433e3 100644
--- a/Pilz.Net/Api/ApiServer.cs
+++ b/Pilz.Net/Api/ApiServer.cs
@@ -1,5 +1,6 @@
 using Castle.Core.Logging;
 using Pilz.Extensions.Reflection;
+using Pilz.Net.Data;
 using System.Diagnostics.CodeAnalysis;
 using System.Net;
 using System.Reflection;
@@ -12,8 +13,12 @@ namespace Pilz.Net.Api;
 
 public class ApiServer : IApiServer
 {
+    protected record struct ThreadHolder(Thread? Thread);
+    public class MissingDataManagerException : Exception { }
+
     protected readonly List<PrivateMessageHandler> handlers = [];
     protected readonly Dictionary<Type, IApiMessageSerializer> serializers = [];
+    protected readonly Dictionary<ThreadHolder, IDataManager> managers = [];
     protected HttpListener httpListener;
     protected int restartAttempts = 0;
     protected DateTime lastRestartAttempt;
@@ -24,6 +29,8 @@ public class ApiServer : IApiServer
     public event OnCheckAuthenticationEventHandler? OnCheckAuthentication;
     public event OnCheckContextEventHandler? OnCheckContext;
     public event OnCheckContextEventHandler? OnCheckContextCompleted;
+    public event OnGetNewDataManagerEventHandler? OnGetNewDataManager;
+    public event DataManagerEventHandler? OnResetDataManager;
 
     protected record PrivateParameterInfo(string Name, int Index);
 
@@ -51,6 +58,10 @@ public class ApiServer : IApiServer
 
     public int MaxConcurentConnections { get; set; } = 5;
 
+    public IDataManager Manager => GetManager();
+
+    public bool ThreadedDataManager { get; set; }
+
     public ApiServer(string apiUrl) : this(apiUrl, null)
     {
     }
@@ -61,16 +72,38 @@ public class ApiServer : IApiServer
         this.httpListener = httpListener ?? CreateDefaultHttpListener();
     }
 
+    private IDataManager GetManager()
+    {
+        var curThread = ThreadedDataManager ? Thread.CurrentThread : null;
+        var threadHolder = new ThreadHolder(curThread);
+
+        if (managers.TryGetValue(threadHolder, out var mgr))
+            return mgr;
+
+        if (OnGetNewDataManager?.Invoke(this, EventArgs.Empty) is not IDataManager manager)
+            throw new MissingDataManagerException();
+        
+        managers.Add(threadHolder, manager);
+
+        return manager;
+    }
+
+    public virtual void ResetManager()
+    {
+        if (managers.Remove(new(ThreadedDataManager ? Thread.CurrentThread : null), out var manager))
+            OnResetDataManager?.Invoke(this, new(manager));
+    }
+
     protected virtual HttpListener CreateDefaultHttpListener()
     {
         var httpListener = new HttpListener();
 
-        httpListener.TimeoutManager.IdleConnection = new TimeSpan(0, 10, 0);
+        httpListener.TimeoutManager.IdleConnection = new TimeSpan(0, 2, 0);
         
         if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
         {
-            httpListener.TimeoutManager.RequestQueue = new TimeSpan(0, 10, 0);
-            httpListener.TimeoutManager.HeaderWait = new TimeSpan(0, 10, 0);
+            httpListener.TimeoutManager.RequestQueue = new TimeSpan(0, 2, 0);
+            httpListener.TimeoutManager.HeaderWait = new TimeSpan(0, 2, 0);
         }
 
         return httpListener;
@@ -296,21 +329,27 @@ public class ApiServer : IApiServer
         if (context is not null)
         {
             Log.Info("Request retrived for " + context.Request.RawUrl);
+            ResetManager();
             OnCheckContext?.Invoke(this, new(context));
             try
             {
                 CheckContext(context);
                 success = true;
             }
+            catch (MissingDataManagerException mdmex)
+            {
+                Log.Error("DataManager is not supported by this server instnace!", mdmex);
+                if (DebugMode) throw;
+            }
             catch (Exception ex)
             {
                 Log.Error("Error checking context", ex);
-                if (DebugMode)
-                    throw;
+                if (DebugMode) throw;
             }
             finally
             {
                 OnCheckContextCompleted?.Invoke(this, new(context));
+                ResetManager();
             }
         }
 
diff --git a/Pilz.Net/Api/Client/BaseChildItemClient.cs b/Pilz.Net/Api/Client/BaseChildItemClient.cs
new file mode 100644
index 0000000..0e8b2c7
--- /dev/null
+++ b/Pilz.Net/Api/Client/BaseChildItemClient.cs
@@ -0,0 +1,34 @@
+using Pilz.Net.Api.Messages;
+using Pilz.Net.Data;
+
+namespace Pilz.Net.Api.Client;
+
+public abstract class BaseChildItemClient<T>(IApiClient client) : BaseClient<T>(client), IBaseChildItemClient<T> where T : IDataObject
+{
+    public virtual async Task<IEnumerable<T>> GetAll(int parentId) 
+    {
+        return (await client.SendRequest<GeneralItemMessages<T>.Items>(ApiEndpoint, HttpMethod.Get, new ApiParameterCollection
+        {
+            ["parent"] = parentId,
+        })).EnsureOk().Items;
+    }
+
+    public override async Task<T> Save(T item)
+    {
+        if (item.Id == 0)
+            throw new NullReferenceException("Item has no parent yet!");
+        return await base.Save(item);
+    }
+
+    public virtual async Task<T> Save(T item, int parentId)
+    {
+        return (await client.SendRequest<GeneralItemMessages<T>.Item>(
+            ApiEndpoint,
+            HttpMethod.Post,
+            GenerateUpdateMessage(item, true),
+            new ApiParameterCollection
+            {
+                ["parent"] = parentId,
+            })).EnsureOk().Item;
+    }
+}
diff --git a/Pilz.Net/Api/Client/BaseClient.cs b/Pilz.Net/Api/Client/BaseClient.cs
new file mode 100644
index 0000000..41a72f3
--- /dev/null
+++ b/Pilz.Net/Api/Client/BaseClient.cs
@@ -0,0 +1,30 @@
+using Pilz.Net.Api.Messages;
+using Pilz.Net.Data;
+
+namespace Pilz.Net.Api.Client;
+
+public abstract class BaseClient<T>(IApiClient client) : IBaseClient<T> where T : IDataObject
+{
+    public abstract string ApiEndpoint { get; }
+
+    public virtual async Task<T> Get(int id)
+    {
+        return (await client.SendRequest<GeneralItemMessages<T>.Item>($"{ApiEndpoint}/{id}", HttpMethod.Get)).EnsureOk().Item;
+    }
+
+    public virtual async Task Delete(int id)
+    {
+        (await client.SendRequest($"{ApiEndpoint}/{id}", HttpMethod.Delete)).EnsureOk();
+    }
+
+    public virtual async Task<T> Save(T item)
+    {
+        var generateNew = item.Id == 0;
+        return (await client.SendRequest<GeneralItemMessages<T>.Item>(
+            generateNew ? ApiEndpoint : $"{ApiEndpoint}/{item.Id}",
+            generateNew ? HttpMethod.Post : HttpMethod.Put,
+            GenerateUpdateMessage(item, generateNew))).EnsureOk().Item;
+    }
+
+    protected abstract ApiMessage GenerateUpdateMessage(T item, bool generateNew);
+}
diff --git a/Pilz.Net/Api/Client/BaseItemClient.cs b/Pilz.Net/Api/Client/BaseItemClient.cs
new file mode 100644
index 0000000..eb97d97
--- /dev/null
+++ b/Pilz.Net/Api/Client/BaseItemClient.cs
@@ -0,0 +1,12 @@
+using Pilz.Net.Api.Messages;
+using Pilz.Net.Data;
+
+namespace Pilz.Net.Api.Client;
+
+public abstract class BaseItemClient<T>(IApiClient client) : BaseClient<T>(client), IBaseItemClient<T> where T : IDataObject
+{
+    public virtual async Task<IEnumerable<T>> GetAll() 
+    {
+        return (await client.SendRequest<GeneralItemMessages<T>.Items>(ApiEndpoint, HttpMethod.Get)).EnsureOk().Items;
+    }
+}
diff --git a/Pilz.Net/Api/Client/IBaseChildItemClient.cs b/Pilz.Net/Api/Client/IBaseChildItemClient.cs
new file mode 100644
index 0000000..058c364
--- /dev/null
+++ b/Pilz.Net/Api/Client/IBaseChildItemClient.cs
@@ -0,0 +1,9 @@
+using Pilz.Net.Data;
+
+namespace Pilz.Net.Api.Client;
+
+public interface IBaseChildItemClient<T> : IBaseClient<T> where T : IDataObject
+{
+    Task<IEnumerable<T>> GetAll(int parentId);
+    Task<T> Save(T item, int parentId);
+}
diff --git a/Pilz.Net/Api/Client/IBaseClient.cs b/Pilz.Net/Api/Client/IBaseClient.cs
new file mode 100644
index 0000000..cdfd231
--- /dev/null
+++ b/Pilz.Net/Api/Client/IBaseClient.cs
@@ -0,0 +1,10 @@
+using Pilz.Net.Data;
+
+namespace Pilz.Net.Api.Client;
+
+public interface IBaseClient<T> where T : IDataObject
+{
+    Task Delete(int id);
+    Task<T> Get(int id);
+    Task<T> Save(T item);
+}
diff --git a/Pilz.Net/Api/Client/IBaseItemClient.cs b/Pilz.Net/Api/Client/IBaseItemClient.cs
new file mode 100644
index 0000000..4d58b7b
--- /dev/null
+++ b/Pilz.Net/Api/Client/IBaseItemClient.cs
@@ -0,0 +1,8 @@
+using Pilz.Net.Data;
+
+namespace Pilz.Net.Api.Client;
+
+public interface IBaseItemClient<T> : IBaseClient<T> where T : IDataObject
+{
+    Task<IEnumerable<T>> GetAll();
+}
diff --git a/Pilz.Net/Api/IApiServer.cs b/Pilz.Net/Api/IApiServer.cs
index d3dd7b4..cf31e6e 100644
--- a/Pilz.Net/Api/IApiServer.cs
+++ b/Pilz.Net/Api/IApiServer.cs
@@ -1,4 +1,5 @@
 using Castle.Core.Logging;
+using Pilz.Net.Data;
 
 namespace Pilz.Net.Api;
 
@@ -6,10 +7,15 @@ public interface IApiServer
 {
     public delegate void OnCheckAuthenticationEventHandler(object sender, ApiAuthCheckEventArgs e);
     public delegate void OnCheckContextEventHandler(object sender, ApiContextEventArgs e);
+    public delegate IDataManager? OnGetNewDataManagerEventHandler(object sender, EventArgs e);
 
     event OnCheckAuthenticationEventHandler? OnCheckAuthentication;
-    event OnCheckContextEventHandler OnCheckContext;
-    event OnCheckContextEventHandler OnCheckContextCompleted;
+    event OnCheckContextEventHandler? OnCheckContext;
+    event OnCheckContextEventHandler? OnCheckContextCompleted;
+    event OnGetNewDataManagerEventHandler? OnGetNewDataManager;
+    event DataManagerEventHandler? OnResetDataManager;
+
+    IDataManager Manager { get; }
 
     string ApiUrl { get; }
 
diff --git a/Pilz.Net/Api/Messages/GeneralItemMessages.cs b/Pilz.Net/Api/Messages/GeneralItemMessages.cs
new file mode 100644
index 0000000..e48e0f0
--- /dev/null
+++ b/Pilz.Net/Api/Messages/GeneralItemMessages.cs
@@ -0,0 +1,21 @@
+using System.ComponentModel;
+
+namespace Pilz.Net.Api.Messages;
+
+public static class GeneralItemMessages<T>
+{
+    public class Item(T item) : ObjectMessage(item);
+    public class Items(List<T> items) : ObjectsMessage(items);
+
+    [EditorBrowsable(EditorBrowsableState.Never)]
+    public class ObjectMessage(T item) : ApiMessage
+    {
+        public T Item { get; } = item;
+    }
+
+    [EditorBrowsable(EditorBrowsableState.Never)]
+    public class ObjectsMessage(List<T> items) : ApiMessage
+    {
+        public List<T> Items { get; } = items;
+    }
+}
diff --git a/Pilz.Net/Api/Server/BaseChildItemHandler.cs b/Pilz.Net/Api/Server/BaseChildItemHandler.cs
new file mode 100644
index 0000000..16b0a94
--- /dev/null
+++ b/Pilz.Net/Api/Server/BaseChildItemHandler.cs
@@ -0,0 +1,52 @@
+using Pilz.Extensions.Reflection;
+using Pilz.Net.Data;
+using Pilz.Net.Extensions;
+using System.Diagnostics;
+
+namespace Pilz.Net.Api.Server;
+
+public abstract class BaseChildItemHandler<TEntity, TParent, TUpdateMsg>(IApiServer server)
+    : BaseHandler<TEntity, TUpdateMsg>(server)
+    where TEntity : IDataObject
+    where TParent : IDataObject
+    where TUpdateMsg : ApiMessage
+{
+    protected virtual bool RegisterGetAll => true;
+    protected virtual bool RegisterPost => true;
+
+    public override void Initialize(IApiServer server)
+    {
+        base.Initialize(server);
+        var t = GetType();
+        if (RegisterGetAll)
+            server.RegisterHandler(t.GetMethod(nameof(GetAll))!.CreateDelegate(this), new(Route, "GET"), Debugger.IsAttached);
+        if (RegisterPost)
+            server.RegisterHandler(t.GetMethod(nameof(Post))!.CreateDelegate(this), new(Route, "POST"), Debugger.IsAttached);
+    }
+
+    public virtual ApiResult GetAll(int parent)
+    {
+        IQueryable<TEntity> list;
+
+        if (parent != 0 && server.Manager.Find(parent, out TParent? parentEntity))
+            list = GetChilds(parentEntity).AsQueryable();
+        else
+            list = server.Manager.Get<TEntity>();
+
+        return list.ToList().Select(ToClient).ToItemsResult();
+    }
+
+    public virtual ApiResult Post(int parent, TUpdateMsg msg)
+    {
+        if (!server.Manager.Find(parent, out TParent? parentEntity))
+            return ApiResult.NotFound();
+        var entity = CreateNewEntity();
+        if (UpdateEntity(entity, msg) is ApiResult result)
+            return result;
+        GetChilds(parentEntity).Add(entity);
+        server.Manager.Save(parentEntity, true);
+        return ToClient(entity).ToItemResult();
+    }
+
+    public abstract IList<TEntity> GetChilds(TParent parent);
+}
diff --git a/Pilz.Net/Api/Server/BaseHandler.cs b/Pilz.Net/Api/Server/BaseHandler.cs
new file mode 100644
index 0000000..b5a8878
--- /dev/null
+++ b/Pilz.Net/Api/Server/BaseHandler.cs
@@ -0,0 +1,63 @@
+using Pilz.Extensions.Reflection;
+using Pilz.Net.Data;
+using Pilz.Net.Extensions;
+using System.Diagnostics;
+using System.Linq.Expressions;
+using System.Reflection;
+using System.Runtime.CompilerServices;
+
+namespace Pilz.Net.Api.Server;
+
+public abstract class BaseHandler<TEntity, TUpdateMsg>(IApiServer server)
+    : IApiHandlerInitializer
+    where TEntity : IDataObject
+    where TUpdateMsg : ApiMessage
+{
+    public abstract string Route { get; }
+    protected virtual bool RegisterGet => true;
+    protected virtual bool RegisterPut => true;
+    protected virtual bool RegisterDelete => true;
+
+    public virtual void Initialize(IApiServer server)
+    {
+        var t = GetType();
+        if (RegisterGet)
+            server.RegisterHandler(t.GetMethod(nameof(Get))!.CreateDelegate(this), new(Route + "/{id}", "GET"), Debugger.IsAttached);
+        if (RegisterPut)
+            server.RegisterHandler(t.GetMethod(nameof(Put))!.CreateDelegate(this), new(Route + "/{id}", "PUT"), Debugger.IsAttached);
+        if (RegisterDelete)
+            server.RegisterHandler(t.GetMethod(nameof(Delete))!.CreateDelegate(this), new(Route + "/{id}", "DELETE"), Debugger.IsAttached);
+    }
+
+    public virtual ApiResult Get(int id)
+    {
+        if (!server.Manager.Find(id, out TEntity? entity))
+            return ApiResult.NotFound();
+        return ToClient(entity).ToItemResult();
+    }
+
+    public virtual ApiResult Put(int id, TUpdateMsg msg)
+    {
+        if (!server.Manager.Find(id, out TEntity? entity))
+            return ApiResult.NotFound();
+        if (UpdateEntity(entity, msg) is ApiResult result)
+            return result;
+        server.Manager.Save(entity, true);
+        return ToClient(entity).ToItemResult();
+    }
+
+    public virtual ApiResult Delete(int id)
+    {
+        server.Manager.Delete<TEntity>(id, true);
+        return ApiResult.Ok();
+    }
+
+    protected virtual TEntity CreateNewEntity()
+    {
+        return Activator.CreateInstance<TEntity>();
+    }
+
+    protected abstract ApiResult? UpdateEntity(TEntity entity, TUpdateMsg msg);
+
+    protected abstract IDataObject ToClient(TEntity entity);
+}
diff --git a/Pilz.Net/Api/Server/BaseItemHandler.cs b/Pilz.Net/Api/Server/BaseItemHandler.cs
new file mode 100644
index 0000000..cc49995
--- /dev/null
+++ b/Pilz.Net/Api/Server/BaseItemHandler.cs
@@ -0,0 +1,39 @@
+using Pilz.Extensions.Reflection;
+using Pilz.Net.Data;
+using Pilz.Net.Extensions;
+using System.Diagnostics;
+
+namespace Pilz.Net.Api.Server;
+
+public abstract class BaseItemHandler<TEntity, TUpdateMsg>(IApiServer server)
+    : BaseHandler<TEntity, TUpdateMsg>(server)
+    where TEntity : IDataObject
+    where TUpdateMsg : ApiMessage
+{
+    protected virtual bool RegisterGetAll => true;
+    protected virtual bool RegisterPost => true;
+
+    public override void Initialize(IApiServer server)
+    {
+        base.Initialize(server);
+        var t = GetType();
+        if (RegisterGetAll)
+            server.RegisterHandler(t.GetMethod(nameof(GetAll))!.CreateDelegate(this), new(Route, "GET"), Debugger.IsAttached);
+        if (RegisterPost)
+            server.RegisterHandler(t.GetMethod(nameof(Put))!.CreateDelegate(this), new(Route, "POST"), Debugger.IsAttached);
+    }
+
+    public virtual ApiResult GetAll()
+    {
+        return server.Manager.Get<TEntity>().ToList().Select(ToClient).ToItemsResult();
+    }
+
+    public virtual ApiResult Post(TUpdateMsg msg)
+    {
+        var entity = CreateNewEntity();
+        if (UpdateEntity(entity, msg) is ApiResult result)
+            return result;
+        server.Manager.Save(entity, true);
+        return entity.ToItemResult();
+    }
+}
diff --git a/Pilz.Net/Data/DataManager.cs b/Pilz.Net/Data/DataManager.cs
new file mode 100644
index 0000000..a2fbce6
--- /dev/null
+++ b/Pilz.Net/Data/DataManager.cs
@@ -0,0 +1,149 @@
+using System.Diagnostics.CodeAnalysis;
+
+namespace Pilz.Net.Data;
+
+public abstract class DataManager : IDataManager
+{
+    protected abstract void UpdateEntity<T>(T obj) where T : IDataObject;
+    protected abstract IQueryable<T> GetEntitySet<T>() where T : IDataObject;
+    protected abstract T? FindEntity<T>(int id) where T : IDataObject;
+    protected abstract void RemoveEntity<T>(T obj) where T : IDataObject;
+    protected abstract void SaveChanges();
+
+    public virtual IQueryable<T> Get<T>() where T : IDataObject
+    {
+        return GetEntitySet<T>();
+    }
+
+    public virtual T FindOrNew<T>(int? id) where T : IDataObject
+    {
+        if (Find<T>(id) is not T obj)
+            obj = Activator.CreateInstance<T>();
+        return obj;
+    }
+
+    public virtual T FindOrNew<T>(int id) where T : IDataObject
+    {
+        if (Find<T>(id) is not T obj)
+            obj = Activator.CreateInstance<T>();
+        return obj;
+    }
+
+    public virtual T? FindOrNull<T>(int? id) where T : IDataObject
+    {
+        if (id == null || id == 0)
+            return default;
+        return Find<T>(id);
+    }
+
+    public virtual T? FindOrNull<T>(int id) where T : IDataObject
+    {
+        if (id == 0)
+            return default;
+        return Find<T>(id);
+    }
+
+    public virtual T? Find<T>(int? id) where T : IDataObject
+    {
+        if (id == null)
+            return default;
+        return Find<T>(id.Value);
+    }
+
+    public virtual T? Find<T>(int id) where T : IDataObject
+    {
+        return FindEntity<T>(id);
+    }
+
+    public virtual bool FindOrNew<T>(int? id, [NotNullWhen(true)] out T? obj) where T : IDataObject
+    {
+        if (id == null || id == 0)
+        {
+            obj = Activator.CreateInstance<T>();
+            return obj != null;
+        }
+        return Find(id.Value, out obj);
+    }
+
+    public virtual bool FindOrNew<T>(int id, [NotNullWhen(true)] out T? obj) where T : IDataObject
+    {
+        if (id == 0)
+        {
+            obj = Activator.CreateInstance<T>();
+            return obj != null;
+        }
+        return Find(id, out obj);
+    }
+
+    public virtual bool FindOrNull<T>(int? id, out T? obj) where T : IDataObject
+    {
+        if (id == null || id == 0)
+        {
+            obj = default;
+            return true;
+        }
+        return Find(id.Value, out obj);
+    }
+
+    public virtual bool FindOrNull<T>(int id, out T? obj) where T : IDataObject
+    {
+        if (id == 0)
+        {
+            obj = default;
+            return true;
+        }
+        return Find(id, out obj);
+    }
+
+    public virtual bool Find<T>(int id, [NotNullWhen(true)] out T? obj) where T : IDataObject
+    {
+        if (FindEntity<T>(id) is not T t)
+        {
+            obj = default;
+            return false;
+        }
+        obj = t;
+        return true;
+    }
+
+    public virtual void Delete<T>(int id) where T : IDataObject
+    {
+        Delete<T>(id, false);
+    }
+
+    public virtual void Delete<T>(int id, bool save) where T : IDataObject
+    {
+        if (Find(id, out T? obj))
+            Delete(obj, save);
+    }
+
+    public virtual void Delete<T>(T? obj) where T : IDataObject
+    {
+        Delete(obj, false);
+    }
+
+    public virtual void Delete<T>(T? obj, bool save) where T : IDataObject
+    {
+        if (obj != null)
+        {
+            RemoveEntity(obj);
+            if (save) Save();
+        }
+    }
+
+    public virtual void Save<T>(T obj) where T : IDataObject
+    {
+        Save(obj, false);
+    }
+
+    public virtual void Save<T>(T obj, bool save) where T : IDataObject
+    {
+        UpdateEntity(obj);
+        if (save) Save();
+    }
+
+    public virtual void Save()
+    {
+        SaveChanges();
+    }
+}
diff --git a/Pilz.Net/Data/DataManagerEventArgs.cs b/Pilz.Net/Data/DataManagerEventArgs.cs
new file mode 100644
index 0000000..85b0978
--- /dev/null
+++ b/Pilz.Net/Data/DataManagerEventArgs.cs
@@ -0,0 +1,8 @@
+namespace Pilz.Net.Data;
+
+public class DataManagerEventArgs(IDataManager manager) : EventArgs
+{
+    public IDataManager Manager { get; } = manager;
+}
+
+public delegate void DataManagerEventHandler(object sender, DataManagerEventArgs e);
\ No newline at end of file
diff --git a/Pilz.Net/Data/IDataManager.cs b/Pilz.Net/Data/IDataManager.cs
new file mode 100644
index 0000000..6648694
--- /dev/null
+++ b/Pilz.Net/Data/IDataManager.cs
@@ -0,0 +1,26 @@
+using System.Diagnostics.CodeAnalysis;
+
+namespace Pilz.Net.Data;
+
+public interface IDataManager
+{
+    void Delete<T>(int id) where T : IDataObject;
+    void Delete<T>(int id, bool save) where T : IDataObject;
+    void Delete<T>(T? obj) where T : IDataObject;
+    void Delete<T>(T? obj, bool save) where T : IDataObject;
+    T? Find<T>(int id) where T : IDataObject;
+    bool Find<T>(int id, [NotNullWhen(true)] out T? obj) where T : IDataObject;
+    T? Find<T>(int? id) where T : IDataObject;
+    T FindOrNew<T>(int id) where T : IDataObject;
+    bool FindOrNew<T>(int id, [NotNullWhen(true)] out T? obj) where T : IDataObject;
+    T FindOrNew<T>(int? id) where T : IDataObject;
+    bool FindOrNew<T>(int? id, [NotNullWhen(true)] out T? obj) where T : IDataObject;
+    T? FindOrNull<T>(int id) where T : IDataObject;
+    bool FindOrNull<T>(int id, out T? obj) where T : IDataObject;
+    T? FindOrNull<T>(int? id) where T : IDataObject;
+    bool FindOrNull<T>(int? id, out T? obj) where T : IDataObject;
+    IQueryable<T> Get<T>() where T : IDataObject;
+    void Save();
+    void Save<T>(T obj) where T : IDataObject;
+    void Save<T>(T obj, bool save) where T : IDataObject;
+}
\ No newline at end of file
diff --git a/Pilz.Net/Data/IDataObject.cs b/Pilz.Net/Data/IDataObject.cs
new file mode 100644
index 0000000..562e335
--- /dev/null
+++ b/Pilz.Net/Data/IDataObject.cs
@@ -0,0 +1,6 @@
+namespace Pilz.Net.Data;
+
+public interface IDataObject
+{
+    public int Id { get; }
+}
diff --git a/Pilz.Net/Extensions/ApiMessageExtensions.cs b/Pilz.Net/Extensions/ApiMessageExtensions.cs
new file mode 100644
index 0000000..7d84dab
--- /dev/null
+++ b/Pilz.Net/Extensions/ApiMessageExtensions.cs
@@ -0,0 +1,36 @@
+using Pilz.Net.Api;
+using Pilz.Net.Api.Messages;
+
+namespace Pilz.Net.Extensions;
+
+public static class ApiMessageExtensions
+{
+    public static ApiResult ToItemResult<T>(this T? @this)
+    {
+        if (@this == null)
+            return ApiResult.NotFound();
+        return ApiResult.Ok(@this.ToItemMsg());
+    }
+
+    public static ApiResult ToItemsResult<T>(this IEnumerable<T>? @this)
+    {
+        if (@this == null)
+            return ApiResult.NotFound();
+        return ApiResult.Ok(@this.ToItemsMsg());
+    }
+
+    public static GeneralItemMessages<T>.Item ToItemMsg<T>(this T @this)
+    {
+        return new GeneralItemMessages<T>.Item(@this);
+    }
+
+    public static GeneralItemMessages<T>.Items ToItemsMsg<T>(this IEnumerable<T> @this)
+    {
+        return new GeneralItemMessages<T>.Items([.. @this]);
+    }
+
+    public static GeneralItemMessages<T>.Items ToItemsMsg<T>(this T[] @this)
+    {
+        return new GeneralItemMessages<T>.Items([.. @this]);
+    }
+}