diff --git a/src/Volo.Abp.Core/Volo/Abp/IHasErrorCode.cs b/src/Volo.Abp.Core/Volo/Abp/IHasErrorCode.cs
index 319bc00adc..1e30895fe6 100644
--- a/src/Volo.Abp.Core/Volo/Abp/IHasErrorCode.cs
+++ b/src/Volo.Abp.Core/Volo/Abp/IHasErrorCode.cs
@@ -2,6 +2,6 @@
 {
     public interface IHasErrorCode
     {
-        int Code { get; set; }
+        string Code { get; set; }
     }
 }
\ No newline at end of file
diff --git a/src/Volo.Abp.Http/Volo/Abp/Http/RemoteServiceErrorInfo.cs b/src/Volo.Abp.Http/Volo/Abp/Http/RemoteServiceErrorInfo.cs
index bfe6af3aa2..25792d1b24 100644
--- a/src/Volo.Abp.Http/Volo/Abp/Http/RemoteServiceErrorInfo.cs
+++ b/src/Volo.Abp.Http/Volo/Abp/Http/RemoteServiceErrorInfo.cs
@@ -11,7 +11,7 @@ namespace Volo.Abp.Http
         /// <summary>
         /// Error code.
         /// </summary>
-        public int Code { get; set; }
+        public string Code { get; set; }
 
         /// <summary>
         /// Error message.
@@ -36,55 +36,16 @@ namespace Volo.Abp.Http
 
         }
 
-        /// <summary>
-        /// Creates a new instance of <see cref="RemoteServiceErrorInfo"/>.
-        /// </summary>
-        /// <param name="message">Error message</param>
-        public RemoteServiceErrorInfo(string message)
-        {
-            Message = message;
-        }
-
-        /// <summary>
-        /// Creates a new instance of <see cref="RemoteServiceErrorInfo"/>.
-        /// </summary>
-        /// <param name="code">Error code</param>
-        public RemoteServiceErrorInfo(int code)
-        {
-            Code = code;
-        }
-
         /// <summary>
         /// Creates a new instance of <see cref="RemoteServiceErrorInfo"/>.
         /// </summary>
         /// <param name="code">Error code</param>
-        /// <param name="message">Error message</param>
-        public RemoteServiceErrorInfo(int code, string message)
-            : this(message)
-        {
-            Code = code;
-        }
-
-        /// <summary>
-        /// Creates a new instance of <see cref="RemoteServiceErrorInfo"/>.
-        /// </summary>
-        /// <param name="message">Error message</param>
         /// <param name="details">Error details</param>
-        public RemoteServiceErrorInfo(string message, string details)
-            : this(message)
-        {
-            Details = details;
-        }
-
-        /// <summary>
-        /// Creates a new instance of <see cref="RemoteServiceErrorInfo"/>.
-        /// </summary>
-        /// <param name="code">Error code</param>
         /// <param name="message">Error message</param>
-        /// <param name="details">Error details</param>
-        public RemoteServiceErrorInfo(int code, string message, string details)
-            : this(message, details)
+        public RemoteServiceErrorInfo(string message, string details = null, string code = null)
         {
+            Message = message;
+            Details = details;
             Code = code;
         }
     }
diff --git a/src/Volo.Abp.UI/Volo/Abp/Ui/UserFriendlyException.cs b/src/Volo.Abp.UI/Volo/Abp/Ui/UserFriendlyException.cs
index 02c1bee77e..95c5e0a265 100644
--- a/src/Volo.Abp.UI/Volo/Abp/Ui/UserFriendlyException.cs
+++ b/src/Volo.Abp.UI/Volo/Abp/Ui/UserFriendlyException.cs
@@ -19,7 +19,7 @@ namespace Volo.Abp.UI
         /// <summary>
         /// An arbitrary error code.
         /// </summary>
-        public int Code { get; set; }
+        public string Code { get; set; }
 
         /// <summary>
         /// Severity of the exception.
@@ -65,17 +65,6 @@ namespace Volo.Abp.UI
             LogLevel = logLevel;
         }
 
-        /// <summary>
-        /// Constructor.
-        /// </summary>
-        /// <param name="code">Error code</param>
-        /// <param name="message">Exception message</param>
-        public UserFriendlyException(int code, string message)
-            : this(message)
-        {
-            Code = code;
-        }
-
         /// <summary>
         /// Constructor.
         /// </summary>
@@ -87,18 +76,6 @@ namespace Volo.Abp.UI
             Details = details;
         }
 
-        /// <summary>
-        /// Constructor.
-        /// </summary>
-        /// <param name="code">Error code</param>
-        /// <param name="message">Exception message</param>
-        /// <param name="details">Additional information about the exception</param>
-        public UserFriendlyException(int code, string message, string details)
-            : this(message, details)
-        {
-            Code = code;
-        }
-
         /// <summary>
         /// Constructor.
         /// </summary>