diff --git a/dotnet/AipsCore/Domain/Abstract/DomainEntity.cs b/dotnet/AipsCore/Domain/Abstract/DomainEntity.cs
new file mode 100644
index 0000000..90a43b5
--- /dev/null
+++ b/dotnet/AipsCore/Domain/Abstract/DomainEntity.cs
@@ -0,0 +1,26 @@
+using AipsCore.Domain.Common.ValueObjects;
+
+namespace AipsCore.Domain.Abstract;
+
+public abstract class DomainEntity<TId> where TId : DomainId
+{
+    private readonly List<IDomainEvent> _domainEvents = [];
+    
+    public TId Id { get; init; }
+    
+    protected DomainEntity()
+    {
+        
+    }
+
+    protected DomainEntity(TId id)
+    {
+        Id = id;
+    }
+
+    public IReadOnlyList<IDomainEvent> GetDomainEvents() => _domainEvents.ToList();
+    
+    public void ClearDomainEvents() => _domainEvents.Clear();
+    
+    protected void RaiseDomainEvent(IDomainEvent domainEvent) => _domainEvents.Add(domainEvent);
+}
\ No newline at end of file
diff --git a/dotnet/AipsCore/Domain/Abstract/IAbstractRepository.cs b/dotnet/AipsCore/Domain/Abstract/IAbstractRepository.cs
new file mode 100644
index 0000000..c41fbd6
--- /dev/null
+++ b/dotnet/AipsCore/Domain/Abstract/IAbstractRepository.cs
@@ -0,0 +1,12 @@
+using AipsCore.Domain.Common.ValueObjects;
+
+namespace AipsCore.Domain.Abstract;
+
+public interface IAbstractRepository<TEntity, in TId>
+    where TEntity : DomainEntity<TId>
+    where TId : DomainId
+{
+    Task<TEntity?> GetByIdAsync(TId id, CancellationToken cancellationToken = default);
+    Task SaveAsync(TEntity entity, CancellationToken cancellationToken = default);
+    Task AddAsync(TEntity entity, CancellationToken cancellationToken = default);
+}
\ No newline at end of file
diff --git a/dotnet/AipsCore/Domain/Abstract/IDomainEvent.cs b/dotnet/AipsCore/Domain/Abstract/IDomainEvent.cs
new file mode 100644
index 0000000..75209ae
--- /dev/null
+++ b/dotnet/AipsCore/Domain/Abstract/IDomainEvent.cs
@@ -0,0 +1,6 @@
+namespace AipsCore.Domain.Abstract;
+
+public interface IDomainEvent
+{
+    
+}
\ No newline at end of file