More Attributes for Serialization

- adding IgnoreState Attribute to make it easier to skip forms on session serialization

TelegramBotBase/Attributes/IgnoreState.cs

@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace TelegramBotBase.Attributes
+{
+
+    /// <summary>
+    /// Declares that this class should not be getting serialized
+    /// </summary>
+    [AttributeUsage(AttributeTargets.Class)]
+    public class IgnoreState : Attribute
+    {
+
+
+    }
+}

TelegramBotBase/BotBase.cs

@@ -584,6 +584,11 @@ namespace TelegramBotBase
                     se.FormUri = form.GetType().FullName;
                     se.QualifiedName = form.GetType().AssemblyQualifiedName;
 
+                    if (form.GetType().GetCustomAttributes(typeof(IgnoreState), true).Length != 0)
+                    {
+                        continue;
+                    }
+
                     //Is Subclass of IStateForm
                     var iform = form as IStateForm;
                     if (iform != null)