fix use says is empty.

BotSharp.Core/Agents/AgentTrainConfig.cs

@@ -0,0 +1,21 @@
+using EntityFrameworkCore.BootKit;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+using System.Text;
+
+namespace BotSharp.Core.Agents
+{
+    [Table("Bot_AgentTrainConfig")]
+    public class AgentTrainConfig : DbRecord, IDbRecord
+    {
+        [Required]
+        [StringLength(36)]
+        public String AgentId { get; set; }
+
+        public decimal ClassificationThreshould { get; set; }
+        
+        public String Pipeline { get; set; }
+    }
+}

BotSharp.Core/Engines/Dialogflow/AgentImporterInDialogflow.cs

@@ -213,17 +213,21 @@ namespace BotSharp.Core.Engines
 
         public void LoadBuildinEntities(Agent agent, string agentDir)
         {
-            agent.Intents.ForEach(intent => {
+            agent.Intents.ForEach(intent =>
+            {
 
-                intent.UserSays.ForEach(us => {
+                if (intent.UserSays != null)
-
+                {
-                    us.Data.Where(data => data.Meta != null)
+                    intent.UserSays.ForEach(us =>
-                        .ToList()
+                    {
-                        .ForEach(data =>
+                        us.Data.Where(data => data.Meta != null)
-                        {
+                            .ToList()
-                            LoadBuildinEntityTypePerUserSay(agent, data);
+                            .ForEach(data =>
-                        });
+                            {
-                });
+                                LoadBuildinEntityTypePerUserSay(agent, data);
+                            });
+                    });
+                }
 
             });
         }

BotSharp.Core/Entities/EntityType.cs

@@ -28,7 +28,7 @@ namespace BotSharp.Core.Entities
 
         public bool IsEnum { get; set; }
 
-        [StringLength(7)]
+        [StringLength(6)]
         public string Color { get; set; }
 
         /// <summary>