diff --git a/DigitalData.Core.Application/EntityExtensions.cs b/DigitalData.Core.Application/EntityExtensions.cs
index 91b448c..99f779e 100644
--- a/DigitalData.Core.Application/EntityExtensions.cs
+++ b/DigitalData.Core.Application/EntityExtensions.cs
@@ -28,7 +28,7 @@ public static class EntityExtensions
     /// <exception cref="InvalidOperationException">
     /// Thrown if the object does not have a readable 'Id' property of type <typeparamref name="TId"/>.
     /// </exception>
-    public static TId? GetId<TId>(this object? obj)
+    public static TId GetId<TId>(this object? obj)
         => obj.GetIdOrDefault<TId>()
         ?? throw new InvalidOperationException($"The object of type '{obj?.GetType().FullName ?? "null"}' does not have a readable 'Id' property of type '{typeof(TId).FullName}'.");
 
diff --git a/DigitalData.Core.Application/Interfaces/ICRUDService.cs b/DigitalData.Core.Application/Interfaces/ICRUDService.cs
index 82f3bc8..eafcca1 100644
--- a/DigitalData.Core.Application/Interfaces/ICRUDService.cs
+++ b/DigitalData.Core.Application/Interfaces/ICRUDService.cs
@@ -14,7 +14,6 @@ namespace DigitalData.Core.Application.Interfaces
         /// <returns>A task representing the asynchronous operation, with a <see cref="DataResult{TId}"/> containing the identifier of the created entity or an error message.</returns>
         Task<DataResult<TId>> CreateAsync(TCreateDto createDto);
 
-
         /// <summary>
         /// Updates an existing entity based on the provided updateDTO and returns the result wrapped in an IServiceMessage,
         /// indicating the success or failure of the operation, including the error messages on failure.