修改了很多

Library/Network/Http/SereinExtension.cs

@@ -0,0 +1,64 @@
+using Newtonsoft.Json.Linq;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Serein.Library.Network.Http
+{
+    internal static partial class SereinExtension
+    {
+        #region JSON相关
+
+        public static bool ToBool(this JToken token, bool defult = false)
+        {
+            var value = token?.ToString();
+            if (string.IsNullOrWhiteSpace(value))
+            {
+                return defult;
+            }
+            if (!bool.TryParse(value, out bool result))
+            {
+                return defult;
+            }
+            else
+            {
+                return result;
+            }
+        }
+        public static int ToInt(this JToken token, int defult = 0)
+        {
+            var value = token?.ToString();
+            if (string.IsNullOrWhiteSpace(value))
+            {
+                return defult;
+            }
+            if (!int.TryParse(value, out int result))
+            {
+                return defult;
+            }
+            else
+            {
+                return result;
+            }
+        }
+        public static double ToDouble(this JToken token, double defult = 0)
+        {
+            var value = token?.ToString();
+            if (string.IsNullOrWhiteSpace(value))
+            {
+                return defult;
+            }
+            if (!int.TryParse(value, out int result))
+            {
+                return defult;
+            }
+            else
+            {
+                return result;
+            }
+        } 
+        #endregion
+    }
+}