Adding some conversion checks for JSON State serialization

TelegramBotBase/SessionBase.cs

@@ -198,6 +198,8 @@ namespace TelegramBotBase
                         catch (ArgumentException ex)
                         {
 
+                            CustomConversionChecks(form, p, f);
+
                         }
                         catch
                         {
@@ -238,6 +240,35 @@ namespace TelegramBotBase
 
         }
 
+        private static void CustomConversionChecks(FormBase form, KeyValuePair<string, object> p, System.Reflection.PropertyInfo f)
+        {
+            //Newtonsoft Int64/Int32 converter issue
+            if (f.PropertyType == typeof(Int32))
+            {
+                int i = 0;
+                if(int.TryParse(p.Value.ToString(), out i))
+                {
+                    f.SetValue(form, i);
+                }
+                return;
+            }
+
+            //Newtonsoft Double/Decimal converter issue
+            if(f.PropertyType == typeof(Decimal) | f.PropertyType == typeof(Nullable<Decimal>))
+            {
+                decimal d = 0;
+                if(decimal.TryParse(p.Value.ToString(), out d))
+                {
+                    f.SetValue(form, d);
+                }
+                return;
+            }
+
+
+        }
+
+
+
         /// <summary>
         /// Saves all open states into the machine.
         /// </summary>