diff --git a/TelegramBotBase.Extensions.Serializer.Database.MSSQL/MSSQLSerializer.cs b/TelegramBotBase.Extensions.Serializer.Database.MSSQL/MSSQLSerializer.cs
index ed08d95..a25cbcd 100644
--- a/TelegramBotBase.Extensions.Serializer.Database.MSSQL/MSSQLSerializer.cs
+++ b/TelegramBotBase.Extensions.Serializer.Database.MSSQL/MSSQLSerializer.cs
@@ -31,7 +31,7 @@ namespace TelegramBotBase.Extensions.Serializer.Database.MSSQL
 
             if (FallbackStateForm != null && !FallbackStateForm.IsSubclassOf(typeof(FormBase)))
             {
-                throw new ArgumentException("FallbackStateForm is not a subclass of FormBase");
+                throw new ArgumentException($"{nameof(FallbackStateForm)} is not a subclass of FormBase");
             }
         }
 
diff --git a/TelegramBotBase/Factories/DefaultStartFormFactory.cs b/TelegramBotBase/Factories/DefaultStartFormFactory.cs
index 7ce2988..a908c85 100644
--- a/TelegramBotBase/Factories/DefaultStartFormFactory.cs
+++ b/TelegramBotBase/Factories/DefaultStartFormFactory.cs
@@ -12,7 +12,7 @@ public class DefaultStartFormFactory : IStartFormFactory
     {
         if (!typeof(FormBase).IsAssignableFrom(startFormClass))
         {
-            throw new ArgumentException("startFormClass argument must be a FormBase type");
+            throw new ArgumentException($"{nameof(startFormClass)} argument must be a {nameof(FormBase)} type");
         }
 
         _startFormClass = startFormClass;
diff --git a/TelegramBotBase/Factories/ServiceProviderStartFormFactory.cs b/TelegramBotBase/Factories/ServiceProviderStartFormFactory.cs
index 4ee81db..fbe4394 100644
--- a/TelegramBotBase/Factories/ServiceProviderStartFormFactory.cs
+++ b/TelegramBotBase/Factories/ServiceProviderStartFormFactory.cs
@@ -14,7 +14,7 @@ public class ServiceProviderStartFormFactory : IStartFormFactory
     {
         if (!typeof(FormBase).IsAssignableFrom(startFormClass))
         {
-            throw new ArgumentException("startFormClass argument must be a FormBase type");
+            throw new ArgumentException($"{nameof(startFormClass)} argument must be a {nameof(FormBase)} type");
         }
 
         _startFormClass = startFormClass;
diff --git a/TelegramBotBase/States/JSONStateMachine.cs b/TelegramBotBase/States/JSONStateMachine.cs
index ada7fe4..5c764a6 100644
--- a/TelegramBotBase/States/JSONStateMachine.cs
+++ b/TelegramBotBase/States/JSONStateMachine.cs
@@ -29,7 +29,7 @@ public class JsonStateMachine : IStateMachine
 
         if (FallbackStateForm != null && !FallbackStateForm.IsSubclassOf(typeof(FormBase)))
         {
-            throw new ArgumentException("FallbackStateForm is not a subclass of FormBase");
+            throw new ArgumentException($"{nameof(FallbackStateForm)} is not a subclass of {nameof(FormBase)}");
         }
 
         FilePath = file ?? throw new ArgumentNullException(nameof(file));
diff --git a/TelegramBotBase/States/SimpleJSONStateMachine.cs b/TelegramBotBase/States/SimpleJSONStateMachine.cs
index 7e8fa58..e722305 100644
--- a/TelegramBotBase/States/SimpleJSONStateMachine.cs
+++ b/TelegramBotBase/States/SimpleJSONStateMachine.cs
@@ -30,7 +30,7 @@ public class SimpleJsonStateMachine : IStateMachine
 
         if (FallbackStateForm != null && !FallbackStateForm.IsSubclassOf(typeof(FormBase)))
         {
-            throw new ArgumentException("FallbackStateForm is not a subclass of FormBase");
+            throw new ArgumentException($"{nameof(FallbackStateForm)} is not a subclass of {nameof(FormBase)}");
         }
 
         FilePath = file ?? throw new ArgumentNullException(nameof(file));
diff --git a/TelegramBotBase/States/XMLStateMachine.cs b/TelegramBotBase/States/XMLStateMachine.cs
index 1a569eb..fdaea1a 100644
--- a/TelegramBotBase/States/XMLStateMachine.cs
+++ b/TelegramBotBase/States/XMLStateMachine.cs
@@ -27,7 +27,7 @@ public class XmlStateMachine : IStateMachine
 
         if (FallbackStateForm != null && !FallbackStateForm.IsSubclassOf(typeof(FormBase)))
         {
-            throw new ArgumentException("FallbackStateForm is not a subclass of FormBase");
+            throw new ArgumentException($"{nameof(FallbackStateForm)} is not a subclass of {nameof(FormBase)}");
         }
 
         FilePath = file ?? throw new ArgumentNullException(nameof(file));