diff --git a/src/Parbad/src/Gateway/AsanPardakht/Internal/AsanPardakhtCrypto.cs b/src/Parbad/src/Gateway/AsanPardakht/Internal/AsanPardakhtCrypto.cs
index 733d4fec..32473092 100644
--- a/src/Parbad/src/Gateway/AsanPardakht/Internal/AsanPardakhtCrypto.cs
+++ b/src/Parbad/src/Gateway/AsanPardakht/Internal/AsanPardakhtCrypto.cs
@@ -10,7 +10,7 @@
 
 namespace Parbad.Gateway.AsanPardakht.Internal
 {
-    public class AsanPardakhtCrypto : IAsanPardakhtCrypto
+    internal class AsanPardakhtCrypto : IAsanPardakhtCrypto
     {
         private readonly HttpClient _httpClient;
         private readonly AsanPardakhtGatewayOptions _gatewayOptions;
diff --git a/src/Parbad/src/Gateway/AsanPardakht/Internal/AsanPardakhtHelper.cs b/src/Parbad/src/Gateway/AsanPardakht/Internal/AsanPardakhtHelper.cs
index 7ce064b5..69d44337 100644
--- a/src/Parbad/src/Gateway/AsanPardakht/Internal/AsanPardakhtHelper.cs
+++ b/src/Parbad/src/Gateway/AsanPardakht/Internal/AsanPardakhtHelper.cs
@@ -13,7 +13,7 @@
 
 namespace Parbad.Gateway.AsanPardakht.Internal
 {
-    public class AsanPardakhtHelper
+    internal class AsanPardakhtHelper
     {
         public static string CreateEncryptData(string key, string iv, string input)
         {
diff --git a/src/Parbad/src/Gateway/AsanPardakht/Internal/Models/AsanPardakhtCallbackResult.cs b/src/Parbad/src/Gateway/AsanPardakht/Internal/Models/AsanPardakhtCallbackResult.cs
index 776afa58..7785c5e0 100644
--- a/src/Parbad/src/Gateway/AsanPardakht/Internal/Models/AsanPardakhtCallbackResult.cs
+++ b/src/Parbad/src/Gateway/AsanPardakht/Internal/Models/AsanPardakhtCallbackResult.cs
@@ -3,7 +3,7 @@
 
 namespace Parbad.Gateway.AsanPardakht.Internal.Models
 {
-    public class AsanPardakhtCallbackResult
+    internal class AsanPardakhtCallbackResult
     {
         public bool IsSucceed { get; set; }
 
diff --git a/src/Parbad/src/Gateway/AsanPardakht/Internal/Models/AsanPardakhtVerifyResult.cs b/src/Parbad/src/Gateway/AsanPardakht/Internal/Models/AsanPardakhtVerifyResult.cs
index 06f55ebe..61b11e4f 100644
--- a/src/Parbad/src/Gateway/AsanPardakht/Internal/Models/AsanPardakhtVerifyResult.cs
+++ b/src/Parbad/src/Gateway/AsanPardakht/Internal/Models/AsanPardakhtVerifyResult.cs
@@ -5,7 +5,7 @@
 
 namespace Parbad.Gateway.AsanPardakht.Internal.Models
 {
-    public class AsanPardakhtVerifyResult
+    internal class AsanPardakhtVerifyResult
     {
         public bool IsSucceed { get; internal set; }
 
diff --git a/src/Parbad/src/Internal/PaymentRequestResult.cs b/src/Parbad/src/Internal/PaymentRequestResult.cs
index 59189c90..432e4952 100644
--- a/src/Parbad/src/Internal/PaymentRequestResult.cs
+++ b/src/Parbad/src/Internal/PaymentRequestResult.cs
@@ -54,6 +54,9 @@ public static PaymentRequestResult SucceedWithRedirect(
             return Succeed(transporter, gatewayAccountName);
         }
 
+        /// <summary>
+        /// Creates an instance of <see cref="PaymentRequestResult"/> which indicates a successful result.
+        /// </summary>
         public static PaymentRequestResult Succeed(IGatewayTransporter gatewayTransporter, string gatewayAccountName)
         {
             return new PaymentRequestResult
@@ -64,16 +67,19 @@ public static PaymentRequestResult Succeed(IGatewayTransporter gatewayTransporte
             };
         }
 
-        public static PaymentRequestResult Failed(string message)
-        {
-            return Failed(message, null);
-        }
+        /// <summary>
+        /// Creates an instance of <see cref="PaymentRequestResult"/> which indicates a failure result.
+        /// </summary>
+        public static PaymentRequestResult Failed(string message) => Failed(message, null);
 
-        public static PaymentRequestResult Failed(string message, string gatewayAccountName)
-        {
-            return Failed(message, gatewayAccountName);
-        }
+        /// <summary>
+        /// Creates an instance of <see cref="PaymentRequestResult"/> which indicates a failure result.
+        /// </summary>
+        public static PaymentRequestResult Failed(string message, string gatewayAccountName) => Failed(message, gatewayAccountName, null);
 
+        /// <summary>
+        /// Creates an instance of <see cref="PaymentRequestResult"/> which indicates a failure result.
+        /// </summary>
         public static PaymentRequestResult Failed(string message, string gatewayAccountName, string gatewayResponseCode)
         {
             return new PaymentRequestResult
diff --git a/src/Parbad/src/Parbad.csproj b/src/Parbad/src/Parbad.csproj
index f438c0b3..10498506 100644
--- a/src/Parbad/src/Parbad.csproj
+++ b/src/Parbad/src/Parbad.csproj
@@ -3,7 +3,7 @@
   <PropertyGroup>
     <PackageId>Parbad</PackageId>
     <Product>Parbad</Product>
-    <VersionPrefix>3.8.2</VersionPrefix>
+    <VersionPrefix>3.8.3</VersionPrefix>
     <TargetFrameworks>netstandard2.0;netstandard2.1;netcoreapp3.0;netcoreapp3.1;net5.0</TargetFrameworks>
     <LangVersion>9</LangVersion>
     <Authors>Parbad Sina Soltani</Authors>
@@ -23,7 +23,7 @@ More information: https://github.com/Sina-Soltani/Parbad
     <PackageRequireLicenseAcceptance>true</PackageRequireLicenseAcceptance>
     <PackageTags>parbad Payment Gateway virtual virtual-gateway Bank Iran Shetab IranKish Mellat Melli Sadad Parsian Pasargad Saman Asan-Pardakht پرداخت درگاه بانک ایران شتاب ایران-کیش ملت ملی سداد پارسیان پاسارگاد سامان آسان-پرداخت</PackageTags>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
-	<PackageReleaseNotes>https://github.com/Sina-Soltani/Parbad/releases/tag/v3.8.2</PackageReleaseNotes>
+	<PackageReleaseNotes>https://github.com/Sina-Soltani/Parbad/releases/tag/v3.8.3</PackageReleaseNotes>
   </PropertyGroup>
 
   <PropertyGroup>
diff --git a/src/Parbad/src/Parbad.xml b/src/Parbad/src/Parbad.xml
index c61dd673..11a70fb6 100644
--- a/src/Parbad/src/Parbad.xml
+++ b/src/Parbad/src/Parbad.xml
@@ -1029,6 +1029,26 @@
             <param name="httpContext"></param>
             <param name="url">Page URL.</param>
         </member>
+        <member name="M:Parbad.Internal.PaymentRequestResult.Succeed(Parbad.IGatewayTransporter,System.String)">
+            <summary>
+            Creates an instance of <see cref="T:Parbad.Internal.PaymentRequestResult"/> which indicates a successful result.
+            </summary>
+        </member>
+        <member name="M:Parbad.Internal.PaymentRequestResult.Failed(System.String)">
+            <summary>
+            Creates an instance of <see cref="T:Parbad.Internal.PaymentRequestResult"/> which indicates a failure result.
+            </summary>
+        </member>
+        <member name="M:Parbad.Internal.PaymentRequestResult.Failed(System.String,System.String)">
+            <summary>
+            Creates an instance of <see cref="T:Parbad.Internal.PaymentRequestResult"/> which indicates a failure result.
+            </summary>
+        </member>
+        <member name="M:Parbad.Internal.PaymentRequestResult.Failed(System.String,System.String,System.String)">
+            <summary>
+            Creates an instance of <see cref="T:Parbad.Internal.PaymentRequestResult"/> which indicates a failure result.
+            </summary>
+        </member>
         <member name="T:Parbad.Internal.PaymentResult">
             <inheritdoc />
         </member>