diff --git a/FoodsharingSiegen.Server/Data/Service/AuditService.cs b/FoodsharingSiegen.Server/Data/Service/AuditService.cs
index 5d438f7..5223049 100644
--- a/FoodsharingSiegen.Server/Data/Service/AuditService.cs
+++ b/FoodsharingSiegen.Server/Data/Service/AuditService.cs
@@ -48,13 +48,13 @@ namespace FoodsharingSiegen.Server.Data.Service
                 var saveR = await Context.SaveChangesAsync();
             
                 if (saveR > 0)
-                    return new OperationResult<Audit>(audit);
+                    return new(audit);
             
-                return new OperationResult<Audit>(new Exception("Couldn't add audit"));
+                return new(new Exception("Couldn't add audit"));
             }
             catch (Exception e)
             {
-                return new OperationResult<Audit>(e);
+                return new(e);
             }
         }
 
@@ -84,13 +84,13 @@ namespace FoodsharingSiegen.Server.Data.Service
 
                 var mat = query?.ToList();
 
-                if (mat != null) return new OperationResult<List<Audit>>(mat);
+                if (mat != null) return new(mat);
 
-                return new OperationResult<List<Audit>>(new Exception("Couldn't load audits"));
+                return new(new Exception("Couldn't load audits"));
             }
             catch (Exception e)
             {
-                return new OperationResult<List<Audit>>(e);
+                return new(e);
             }
         }
 
diff --git a/FoodsharingSiegen.Server/Data/Service/ProspectService.cs b/FoodsharingSiegen.Server/Data/Service/ProspectService.cs
index 39893f8..c96d28a 100644
--- a/FoodsharingSiegen.Server/Data/Service/ProspectService.cs
+++ b/FoodsharingSiegen.Server/Data/Service/ProspectService.cs
@@ -38,7 +38,7 @@ namespace FoodsharingSiegen.Server.Data.Service
             try
             {
                 var targetProspect = await Context.Prospects!.Include(x => x.Interactions).FirstOrDefaultAsync(x => x.Id == interaction.ProspectID);
-                if (targetProspect == null) return new OperationResult<Interaction>(new Exception("Invalid prospect id"));
+                if (targetProspect == null) return new(new Exception("Invalid prospect id"));
                 
                 interaction.ProspectID = Guid.Empty;
                 interaction.Created = DateTime.UtcNow;
@@ -53,11 +53,11 @@ namespace FoodsharingSiegen.Server.Data.Service
                 Context.Entry(targetProspect).State = EntityState.Detached;
                 Context.Entry(interaction).State = EntityState.Detached;
                 
-                return new OperationResult<Interaction>(interaction);
+                return new(interaction);
             }
             catch (Exception e)
             {
-                return new OperationResult<Interaction>(e);
+                return new(e);
             }
         }
 
@@ -74,7 +74,7 @@ namespace FoodsharingSiegen.Server.Data.Service
         {
             try
             {
-                if (prospect == null) return new OperationResult<Prospect>(new Exception("Cannot be empty"));
+                if (prospect == null) return new(new Exception("Cannot be empty"));
 
                 prospect.Created = DateTime.UtcNow;
                 prospect.Id = Guid.Empty;
@@ -85,14 +85,14 @@ namespace FoodsharingSiegen.Server.Data.Service
                 if (saveR > 0)
                 {
                     await AuditService.Insert(AuditType.CreateProspect, prospect.Name, prospect.FsId.ToString());
-                    return new OperationResult<Prospect>(prospect);
+                    return new(prospect);
                 }
             
-                return new OperationResult<Prospect>(new Exception("Couldn't add prospect"));
+                return new(new Exception("Couldn't add prospect"));
             }
             catch (Exception e)
             {
-                return new OperationResult<Prospect>(e);
+                return new(e);
             }
         }
 
@@ -118,11 +118,11 @@ namespace FoodsharingSiegen.Server.Data.Service
                 
                 var prospects = await prospectsQuery.ToListAsync();
                 
-                return new OperationResult<List<Prospect>>(prospects);
+                return new(prospects);
             }
             catch (Exception e)
             {
-                return new OperationResult<List<Prospect>>(e);
+                return new(e);
             }
         }
 
@@ -139,16 +139,16 @@ namespace FoodsharingSiegen.Server.Data.Service
         {
             try
             {
-                Context.Interactions!.Remove(new Interaction { Id = interactionId });
+                Context.Interactions!.Remove(new() { Id = interactionId });
                 await Context.SaveChangesAsync();
 
                 await AuditService.Insert(AuditType.RemoveInteraction, "?");
                 
-                return new OperationResult();
+                return new();
             }
             catch (Exception e)
             {
-                return new OperationResult(e);
+                return new(e);
             }
         }
 
@@ -166,7 +166,7 @@ namespace FoodsharingSiegen.Server.Data.Service
             try
             {
                 var entityProspect = await Context.Prospects!.FirstOrDefaultAsync(x => x.Id == prospect.Id);
-                if (entityProspect == null) return new OperationResult(new Exception("Prospect not found"));
+                if (entityProspect == null) return new(new Exception("Prospect not found"));
 
                 entityProspect.Memo = prospect.Memo;
                 entityProspect.Name = prospect.Name;
@@ -175,14 +175,14 @@ namespace FoodsharingSiegen.Server.Data.Service
             
                 var saveR = await Context.SaveChangesAsync();
             
-                if(saveR < 1) return new OperationResult(new Exception("Fehler beim speichern"));
+                if(saveR < 1) return new(new Exception("Fehler beim speichern"));
                 
                 await AuditService.Insert(AuditType.EditProspect, prospect.Name);
-                return new OperationResult();
+                return new();
             }
             catch (Exception e)
             {
-                return new OperationResult(e);
+                return new(e);
             }
         }
 
diff --git a/FoodsharingSiegen.Server/Data/Service/UserService.cs b/FoodsharingSiegen.Server/Data/Service/UserService.cs
index 7d7e40c..dcdcc91 100644
--- a/FoodsharingSiegen.Server/Data/Service/UserService.cs
+++ b/FoodsharingSiegen.Server/Data/Service/UserService.cs
@@ -44,7 +44,7 @@ namespace FoodsharingSiegen.Server.Data.Service
             try
             {
                 if (await Context.Users!.AnyAsync(x => x.Mail.ToLower().Equals(user.Mail.ToLower())))
-                    return new OperationResult<User>(new Exception("Diese E-Mail Adresse wird bereits verwendet"));
+                    return new(new Exception("Diese E-Mail Adresse wird bereits verwendet"));
 
                 user.Created = DateTime.UtcNow;
 
@@ -54,15 +54,15 @@ namespace FoodsharingSiegen.Server.Data.Service
                 await Context.Users!.AddAsync(user);
 
                 var saveResult = await Context.SaveChangesAsync();
-                if (saveResult == 0) return new OperationResult<User>(new Exception("Fehler bei der Registrierung"));
+                if (saveResult == 0) return new(new Exception("Fehler bei der Registrierung"));
 
                 await AuditService.Insert(AuditType.CreateUser, user.Mail);
 
-                return new OperationResult<User>(user);
+                return new(user);
             }
             catch (Exception e)
             {
-                return new OperationResult<User>(e);
+                return new(e);
             }
         }
 
@@ -80,11 +80,11 @@ namespace FoodsharingSiegen.Server.Data.Service
             try
             {
                 var users = await Context.Users!.AsNoTracking().ToListAsync();
-                return new OperationResult<List<User>>(users);
+                return new(users);
             }
             catch (Exception e)
             {
-                return new OperationResult<List<User>>(e);
+                return new(e);
             }
         }
 
@@ -102,7 +102,7 @@ namespace FoodsharingSiegen.Server.Data.Service
             try
             {
                 var user = await Context.Users!.Include(x => x.Interactions).FirstOrDefaultAsync(x => x.Id == userId);
-                if (user == null) return new OperationResult(new Exception("User not found"));
+                if (user == null) return new(new Exception("User not found"));
 
                 // Interaktionen vom aktuellen Nutzer übernehmen
                 if(CurrentUser?.Id != null)
@@ -118,13 +118,13 @@ namespace FoodsharingSiegen.Server.Data.Service
                 Context.Users?.Remove(user);
                 var saveR = await Context.SaveChangesAsync();
 
-                if (saveR < 1) return new OperationResult(new Exception("Fehler beim Löschen"));
+                if (saveR < 1) return new(new Exception("Fehler beim Löschen"));
                 await AuditService.Insert(AuditType.RemoveUser, user.Mail);
-                return new OperationResult();
+                return new();
             }
             catch (Exception e)
             {
-                return new OperationResult(e);
+                return new(e);
             }
         }
 
@@ -142,22 +142,22 @@ namespace FoodsharingSiegen.Server.Data.Service
             try
             {
                 var entityUser = await Context.Users!.FirstOrDefaultAsync(x => x.Id == user.Id);
-                if (entityUser == null) return new OperationResult(new Exception("User not found"));
+                if (entityUser == null) return new(new Exception("User not found"));
 
                 entityUser.Password = user.Password;
 
                 var saveR = await Context.SaveChangesAsync();
 
-                if (saveR < 1) return new OperationResult(new Exception("Fehler beim Speichern"));
+                if (saveR < 1) return new(new Exception("Fehler beim Speichern"));
 
                 var auditData = CurrentUser?.Id == user.Id ? "sich selbst" : user.Mail;
                 await AuditService.Insert(AuditType.SetUserPassword, auditData);
 
-                return new OperationResult();
+                return new();
             }
             catch (Exception e)
             {
-                return new OperationResult(e);
+                return new(e);
             }
         }
 
@@ -175,7 +175,7 @@ namespace FoodsharingSiegen.Server.Data.Service
             try
             {
                 var entityUser = await Context.Users!.FirstOrDefaultAsync(x => x.Id == user.Id);
-                if (entityUser == null) return new OperationResult(new Exception("User not found"));
+                if (entityUser == null) return new(new Exception("User not found"));
 
                 if (entityUser.Mail != user.Mail ||
                     entityUser.Verified != user.Verified ||
@@ -192,17 +192,17 @@ namespace FoodsharingSiegen.Server.Data.Service
                 entityUser.Network = user.Network;
 
                 if (!Context.HasChanges())
-                    return new OperationResult(new Exception("Nichts zum Speichern gefunden"));
+                    return new(new Exception("Nichts zum Speichern gefunden"));
 
                 var saveR = await Context.SaveChangesAsync();
 
-                if (saveR < 1) return new OperationResult(new Exception("Fehler beim Speichern"));
+                if (saveR < 1) return new(new Exception("Fehler beim Speichern"));
                 await AuditService.Insert(AuditType.UpdateUser, user.Mail);
-                return new OperationResult();
+                return new();
             }
             catch (Exception e)
             {
-                return new OperationResult(e);
+                return new(e);
             }
         }
 
diff --git a/FoodsharingSiegen.Server/Dialogs/AddInteractionModal.razor b/FoodsharingSiegen.Server/Dialogs/AddInteractionModal.razor
index 74e521e..3287bf3 100644
--- a/FoodsharingSiegen.Server/Dialogs/AddInteractionModal.razor
+++ b/FoodsharingSiegen.Server/Dialogs/AddInteractionModal.razor
@@ -30,7 +30,7 @@
                 @*     <Field> *@
                 @*         <FieldLabel>Wer?</FieldLabel> *@
                 @*         <Select TValue="Guid" @bind-SelectedValue="SelectedUser"> *@
-                @*             @foreach (var user in Users ?? new List<User>()) *@
+                @*             @foreach (var user in Users ?? []) *@
                 @*             { *@
                 @*                 <SelectItem Value="@user.Id">@user.Name</SelectItem> *@
                 @*             } *@