Projektstruktur optimiert und Benutzer- & Gruppenverzeichnisdienste abgeschlossen.

DigitalData.Core.Contracts/Application/IServiceResult.cs

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+namespace DigitalData.Core.Contracts.Application
+{
+    /// <summary>
+    /// Represents the outcome of a service operation, extending IServiceMessage with the addition of a data payload.
+    /// This interface is generic, allowing for the specification of the type of data returned by the service operation.
+    /// It is used to communicate not just the success or failure of an operation, but also to return any relevant data
+    /// along with the operation's outcome.
+    /// </summary>
+    /// <typeparam name="T">The type of the data associated with the service operation's outcome. This could be a model,
+    /// a collection of models, or any other type relevant to the operation.</typeparam>
+    public interface IServiceResult<T> : IServiceMessage
+    {
+        /// <summary>
+        /// Gets or sets the data resulting from the service operation. This property is nullable to accommodate operations
+        /// that might not return data upon failure.
+        /// </summary>
+        T? Data { get; set; }
+    }
+}