diff --git a/DbFirst.Contracts/Catalogs/CatalogReadDto.cs b/DbFirst.Contracts/Catalogs/CatalogReadDto.cs
index 6996e60..b2ce883 100644
--- a/DbFirst.Contracts/Catalogs/CatalogReadDto.cs
+++ b/DbFirst.Contracts/Catalogs/CatalogReadDto.cs
@@ -1,12 +1,12 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
+namespace DbFirst.Contracts.Catalogs;
 
-namespace DbFirst.Contracts.Catalogs
+public class CatalogReadDto
 {
-    internal class CatalogReadDto
-    {
-    }
-}
+    public int Guid { get; set; }
+    public string CatTitle { get; set; } = string.Empty;
+    public string CatString { get; set; } = string.Empty;
+    public string AddedWho { get; set; } = string.Empty;
+    public DateTime AddedWhen { get; set; }
+    public string? ChangedWho { get; set; }
+    public DateTime? ChangedWhen { get; set; }
+}
\ No newline at end of file
diff --git a/DbFirst.Contracts/Catalogs/CatalogWriteDto.cs b/DbFirst.Contracts/Catalogs/CatalogWriteDto.cs
index 8e74037..883f336 100644
--- a/DbFirst.Contracts/Catalogs/CatalogWriteDto.cs
+++ b/DbFirst.Contracts/Catalogs/CatalogWriteDto.cs
@@ -1,12 +1,10 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
+using DbFirst.Domain;
 
-namespace DbFirst.Contracts.Catalogs
+namespace DbFirst.Contracts.Catalogs;
+
+public class CatalogWriteDto
 {
-    internal class CatalogWriteDto
-    {
-    }
-}
+    public string CatTitle { get; set; } = string.Empty;
+    public string CatString { get; set; } = string.Empty;
+    public CatalogUpdateProcedure UpdateProcedure { get; set; } = CatalogUpdateProcedure.Update;
+}
\ No newline at end of file
diff --git a/DbFirst.Contracts/Dashboards/DashboardInfoDto.cs b/DbFirst.Contracts/Dashboards/DashboardInfoDto.cs
index d80581b..2e6e160 100644
--- a/DbFirst.Contracts/Dashboards/DashboardInfoDto.cs
+++ b/DbFirst.Contracts/Dashboards/DashboardInfoDto.cs
@@ -1,12 +1,7 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
+namespace DbFirst.Contracts.Dashboards;
 
-namespace DbFirst.Contracts.Dashboards
+public class DashboardInfoDto
 {
-    internal class DashboardInfoDto
-    {
-    }
-}
+    public string Id { get; set; } = string.Empty;
+    public string Name { get; set; } = string.Empty;
+}
\ No newline at end of file
diff --git a/DbFirst.Contracts/Layouts/LayoutDto.cs b/DbFirst.Contracts/Layouts/LayoutDto.cs
index 597efe3..4185c65 100644
--- a/DbFirst.Contracts/Layouts/LayoutDto.cs
+++ b/DbFirst.Contracts/Layouts/LayoutDto.cs
@@ -1,12 +1,9 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
+namespace DbFirst.Contracts.Layouts;
 
-namespace DbFirst.Contracts.Layouts
+public class LayoutDto
 {
-    internal class LayoutDto
-    {
-    }
-}
+    public string LayoutType { get; set; } = string.Empty;
+    public string LayoutKey { get; set; } = string.Empty;
+    public string UserName { get; set; } = string.Empty;
+    public string LayoutData { get; set; } = string.Empty;
+}
\ No newline at end of file
diff --git a/DbFirst.Contracts/Massdata/MassdataReadDto.cs b/DbFirst.Contracts/Massdata/MassdataReadDto.cs
index 6344872..8a7a52d 100644
--- a/DbFirst.Contracts/Massdata/MassdataReadDto.cs
+++ b/DbFirst.Contracts/Massdata/MassdataReadDto.cs
@@ -1,12 +1,12 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
+namespace DbFirst.Contracts.MassData;
 
-namespace DbFirst.Contracts.MassData
+public class MassDataReadDto
 {
-    internal class MassDataReadDto
-    {
-    }
-}
+    public int Id { get; set; }
+    public string CustomerName { get; set; } = string.Empty;
+    public decimal Amount { get; set; }
+    public string Category { get; set; } = string.Empty;
+    public bool StatusFlag { get; set; }
+    public DateTime AddedWhen { get; set; }
+    public DateTime? ChangedWhen { get; set; }
+}
\ No newline at end of file
diff --git a/DbFirst.Contracts/Massdata/MassdataWriteDto.cs b/DbFirst.Contracts/Massdata/MassdataWriteDto.cs
index 4c0ec33..720c511 100644
--- a/DbFirst.Contracts/Massdata/MassdataWriteDto.cs
+++ b/DbFirst.Contracts/Massdata/MassdataWriteDto.cs
@@ -1,12 +1,9 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
+namespace DbFirst.Contracts.MassData;
 
-namespace DbFirst.Contracts.MassData
+public class MassDataWriteDto
 {
-    internal class MassDataWriteDto
-    {
-    }
-}
+    public string CustomerName { get; set; } = string.Empty;
+    public decimal Amount { get; set; }
+    public string Category { get; set; } = string.Empty;
+    public bool StatusFlag { get; set; }
+}
\ No newline at end of file