Implement generic AbpJsonValueConverter

framework/src/Volo.Abp.EntityFrameworkCore/Volo/Abp/EntityFrameworkCore/ValueConverters/AbpJsonValueConverter.cs

@@ -0,0 +1,16 @@
+using System.Collections.Generic;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Newtonsoft.Json;
+
+namespace Volo.Abp.EntityFrameworkCore.ValueConverters
+{
+    public class AbpJsonValueConverter<TPropertyType> : ValueConverter<TPropertyType, string>
+    {
+        public AbpJsonValueConverter()
+            : base(
+                d => JsonConvert.SerializeObject(d, Formatting.None),
+                s => JsonConvert.DeserializeObject<TPropertyType>(s))
+        {
+        }
+    }
+}