diff --git a/.vs/WHMCS API/v15/.suo b/.vs/WHMCS API/v15/.suo
index bc5bad25b9255e452481561df7e0c2b95761d062..20b3c0f2abc723710f23aee7deb0630e7182e2bd 100644
Binary files a/.vs/WHMCS API/v15/.suo and b/.vs/WHMCS API/v15/.suo differ
diff --git a/API.cs b/API.cs
index 77b681fb04e70c61998be39397b158b865cecd7c..7b19094e9c49f879a16e97821b603fdbfe88f281 100644
--- a/API.cs
+++ b/API.cs
@@ -11,21 +11,21 @@ namespace WHMCS_API
 {
     public class API
     {
+
+        JsonSerializerSettings settings;
+
         private readonly Call _call;
         public API(string Username, string Password, string AccessKey, string Url)
         {
             _call = new Call(Username, Password, AccessKey, Url);
+            settings = new JsonSerializerSettings
+            {
+                NullValueHandling = NullValueHandling.Ignore,
+                MissingMemberHandling = MissingMemberHandling.Ignore
+            };
         }
 
-        /// <summary>
-        /// Validates a client login
-        /// </summary>
-        /// <see cref="https://developers.whmcs.com/api-reference/validatelogin/"/>
-        /// <param name="Email">Client Email</param>
-        /// <param name="Password">Client Password (cleartext)</param>
-        /// <returns>Returns the result of the call
-        /// The userid string for the session Session["uid"]
-        /// The passwordhash for the session Session["upw"]</returns>
+        
         public ValidateLogin.ValidateLogin ValidateLogin(string Email, string Password)
         {
             NameValueCollection data = new NameValueCollection()
@@ -35,15 +35,17 @@ namespace WHMCS_API
                 { EnumUtil.GetString(APIEnums.ValidateLoginParams.Password), Password }
             };
 
+            string req = _call.MakeCall(data);
+            JObject result = JObject.Parse(req);
+
+            if (result["result"].ToString() == "success")
+                return JsonConvert.DeserializeObject<ValidateLogin.ValidateLogin>(req, settings);
+            else
+                throw new Exception("An API Error Ocurred", new Exception(result["message"].ToString()));
+
             return JsonConvert.DeserializeObject<ValidateLogin.ValidateLogin>(_call.MakeCall(data));
         }
-
-        /// <summary>
-        /// Checks if a domain is available to regsiter, if not will return the whois
-        /// </summary>
-        /// <see cref="https://developers.whmcs.com/api-reference/domainwhois/"/>
-        /// <param name="Domain">The domain to be checked</param>
-        /// <returns>Result of the call, if the domain is registered or not, and if registered the WhoIs</returns>
+    
         public DomainWhoIs DomainWhoIs(string Domain)
         {
             NameValueCollection data = new NameValueCollection()
@@ -56,24 +58,12 @@ namespace WHMCS_API
             JObject result = JObject.Parse(req);
 
             if (result["result"].ToString() == "success")
-                return JsonConvert.DeserializeObject<DomainWhoIs>(req);
+                return JsonConvert.DeserializeObject<DomainWhoIs>(req, settings);
             else
                 throw new Exception("An API Error Ocurred", new Exception(result["message"].ToString()));
             
         }
-
-        /// <summary>
-        /// Registers a new client
-        /// </summary>
-        /// <remarks>
-        /// When registerying an exception may occurr. If you get "An API Error Ocurred" read the inner exception
-        /// </remarks>
-        /// <example>
-        /// try { your code } catch (Exception ex) { Console.WriteLine(ex.InnerException.Message); }
-        /// </example>
-        /// <see cref="https://developers.whmcs.com/api-reference/addclient/"/>
-        /// <param name="ClientInfo">The Model of the AddClient action</param>
-        /// <returns>If success returns the ID of the newly created user otherwise will throw an exception</returns>
+    
         public int AddClient(AddClient ClientInfo)
         {
             NameValueCollection data = new NameValueCollection()
@@ -95,14 +85,7 @@ namespace WHMCS_API
                 throw new Exception("An API Error Ocurred", new Exception(result["message"].ToString()));
 
         }
-
-        /// <summary>
-        /// Gets the client details
-        /// </summary>
-        /// <param name="ClientID">The client ID to search</param>
-        /// <param name="ClientEmail">The client Email to search</param>
-        /// <param name="Stats">Get extended stats for the client</param>
-        /// <returns>All details of the client</returns>
+       
         public GetClientsDetails.GetClientsDetails GetClientsDetails(int ClientID = -1, string ClientEmail = "", bool Stats = false)
         {
             if (ClientID == -1 && ClientEmail == "")
@@ -121,20 +104,11 @@ namespace WHMCS_API
             string req = _call.MakeCall(data);
             JObject result = JObject.Parse(req);
             if (result["result"].ToString() == "success")
-                return JsonConvert.DeserializeObject<GetClientsDetails.GetClientsDetails>(req);
+                return JsonConvert.DeserializeObject<GetClientsDetails.GetClientsDetails>(req, settings);
             else
                 throw new Exception("An API Error occurred", new Exception(result["message"].ToString()));
         }
-
-        /// <summary>
-        /// Get the orders (for all clients/specific client/specific order/specific status)
-        /// </summary>
-        /// <param name="LimitStart">The offset for the returned order data (default: 0)</param>
-        /// <param name="LimitNumber">The number of records to return (default: 25)</param>
-        /// <param name="OrderID">Find orders for a specific id</param>
-        /// <param name="UserID">Find orders for a specific client id</param>
-        /// <param name="Status">Find orders for a specific status</param>
-        /// <returns>In a modelm, total results, start number, the number of results returned</returns>
+     
         public GetOrders.GetOrders GetOrders(int LimitStart = 0, int LimitNumber = 25, int OrderID = -1, int UserID = -1, string Status = "")
         {
             NameValueCollection data = new NameValueCollection()
@@ -150,7 +124,7 @@ namespace WHMCS_API
             if (Status != "")
                 data.Add(EnumUtil.GetString(APIEnums.GetOrdersParams.Status), Status);
 
-            return JsonConvert.DeserializeObject<GetOrders.GetOrders>(_call.MakeCall(data));
+            return JsonConvert.DeserializeObject<GetOrders.GetOrders>(_call.MakeCall(data), settings);
         }
 
         public GetTransactions.GetTransactions GetTransactions(int InvoiceID = -1, int ClientID = -1, string TransactionID = "")
@@ -166,7 +140,7 @@ namespace WHMCS_API
             if (TransactionID != "")
                 data.Add(EnumUtil.GetString(APIEnums.GetTransactionsParams.TransactionID), TransactionID);
 
-            return JsonConvert.DeserializeObject<GetTransactions.GetTransactions>(_call.MakeCall(data));
+            return JsonConvert.DeserializeObject<GetTransactions.GetTransactions>(_call.MakeCall(data), settings);
         }
 
         public GetClientsProducts.GetClientsProducts GetClientsProducts(int LimitStart = 0, int LimitNum = 25, int ClientID = -1, int ServiceID = -1, int ProductID = -1, string Domain = "", string Username = "")
@@ -189,7 +163,42 @@ namespace WHMCS_API
             if (Username != "")
                 data.Add(EnumUtil.GetString(APIEnums.GetClientsProductsParams.Username), Username);
 
-            return JsonConvert.DeserializeObject<GetClientsProducts.GetClientsProducts>(_call.MakeCall(data));
+            return JsonConvert.DeserializeObject<GetClientsProducts.GetClientsProducts>(_call.MakeCall(data), settings);
+        }
+
+        public GetInvoices.GetInvoices GetInvoices(int LimitStart = 0, int LimitNumber = 25, int UserID = -1, string Status = "")
+        {
+            NameValueCollection data = new NameValueCollection()
+            {
+                { "action", APIEnums.Actions.GetInvoices.ToString() },
+                { EnumUtil.GetString(APIEnums.GetInvoicesParams.LimitStart), LimitStart.ToString() },
+                { EnumUtil.GetString(APIEnums.GetInvoicesParams.LimitNumber), LimitNumber.ToString() }
+            };
+            if (UserID != -1)
+                data.Add(EnumUtil.GetString(APIEnums.GetInvoicesParams.UserID), UserID.ToString());
+            if (Status != "")
+                data.Add(EnumUtil.GetString(APIEnums.GetInvoicesParams.Status), Status);
+
+            return JsonConvert.DeserializeObject<GetInvoices.GetInvoices>(_call.MakeCall(data), settings);
+        }
+
+        public GetInvoice.GetInvoice GetInvoice(int InvoiceID)
+        {
+            NameValueCollection data = new NameValueCollection()
+            {
+                { "action", EnumUtil.GetString(APIEnums.Actions.GetInvoice) },
+                { EnumUtil.GetString(APIEnums.GetInvoiceParams.InvoiceID), InvoiceID.ToString() }
+            };
+
+            string req = _call.MakeCall(data);
+
+            JObject result = JObject.Parse(req);
+
+            if (result["result"].ToString() == "success")
+                return JsonConvert.DeserializeObject<GetInvoice.GetInvoice>(req, settings);
+            else
+                throw new Exception("An API Error Ocurred", new Exception(result["message"].ToString()));
+
         }
     }
 }
diff --git a/Call.cs b/Call.cs
index 19b58248699e1310106d475d3cfe4b64712c3a5c..4820b6564d84e9bc6a479a45140dc709f4750338 100644
--- a/Call.cs
+++ b/Call.cs
@@ -16,13 +16,7 @@ namespace WHMCS_API
         private readonly string AccessKey;
         private readonly string Url;
 
-        /// <summary>
-        /// Prepare the call of the API
-        /// </summary>
-        /// <param name="Username">API Username</param>
-        /// <param name="Password">API Password</param>
-        /// <param name="AccessKey">API AccessKey (must be set in config.php)</param>
-        /// <param name="Url">WHMCS User Front End URL (ex: https://example.com/client)</param>
+        
         public Call(string Username, string Password, string AccessKey, string Url)
         {
             this.Username = Username;
@@ -69,12 +63,10 @@ namespace WHMCS_API
 
         private string CalculateMD5Hash(string input)
         {
-            // step 1, calculate MD5 hash from input
             MD5 md5 = MD5.Create();
             byte[] inputBytes = Encoding.ASCII.GetBytes(input);
             byte[] hash = md5.ComputeHash(inputBytes);
 
-            // step 2, convert byte array to hex string
             StringBuilder sb = new StringBuilder();
             foreach (byte t in hash)
             {
diff --git a/Enums.cs b/Enums.cs
index b2da36f3dfd38cf015307759b99e8ef63912690c..5256fd3ec1c416ced347bf5d590b36b15d57a717 100644
--- a/Enums.cs
+++ b/Enums.cs
@@ -86,6 +86,19 @@ namespace WHMCS_API
             [StringValue("username2")] Username
         }
 
+        public enum GetInvoicesParams
+        {
+            [StringValue("limitstart")] LimitStart,
+            [StringValue("limitnum")] LimitNumber,
+            [StringValue("userid")] UserID,
+            [StringValue("status")] Status
+        }
+
+        public enum GetInvoiceParams
+        {
+            [StringValue("invoiceid")] InvoiceID
+        }
+
         /// <summary>
         /// Actions Supported by the WHMCS API that are implemented in this Wrapper
         /// </summary>
@@ -97,12 +110,14 @@ namespace WHMCS_API
             [StringValue("GetClientsDetails")] GetClientsDetails,
             [StringValue("GetOrders")] GetOrders,
             [StringValue("GetTransactions")] GetTransactions,
-            [StringValue("GetClientsProducts")] GetClientsProducts
+            [StringValue("GetClientsProducts")] GetClientsProducts,
+            [StringValue("GetInvoices")] GetInvoices,
+            [StringValue("GetInvoice")] GetInvoice
         }
     }
 
     /// <summary>
-    /// Creastes an attribute called StringValue
+    /// Creates an attribute called StringValue
     /// </summary>
     public class StringValue : Attribute
     {
@@ -125,11 +140,6 @@ namespace WHMCS_API
     /// </summary>
     public static class EnumUtil
     {
-        /// <summary>
-        /// Gets the string out of the enum
-        /// </summary>
-        /// <param name="value">The enum from witch will be extracted the string</param>
-        /// <returns>The string associated with the value enum</returns>
         public static string GetString(Enum value)
         {
             string output = null;
diff --git a/GetInvoice.cs b/GetInvoice.cs
new file mode 100644
index 0000000000000000000000000000000000000000..0081de44ca3b316975b5b23e9bd27be11ac9dc0c
--- /dev/null
+++ b/GetInvoice.cs
@@ -0,0 +1,155 @@
+using Newtonsoft.Json;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace WHMCS_API.GetInvoice
+{
+    public class Item
+    {
+
+        [JsonProperty("id")]
+        public string ID { get; set; }
+
+        [JsonProperty("type")]
+        public string Type { get; set; }
+
+        [JsonProperty("relid")]
+        public string relid { get; set; }
+
+        [JsonProperty("description")]
+        public string Description { get; set; }
+
+        [JsonProperty("amount")]
+        public string Amount { get; set; }
+
+        [JsonProperty("taxed")]
+        public string Taxed { get; set; }
+    }
+
+    public class Items
+    {
+
+        [JsonProperty("item")]
+        public IList<Item> Item { get; set; }
+    }
+
+    public class Transaction
+    {
+
+        [JsonProperty("id")]
+        public string ID { get; set; }
+
+        [JsonProperty("userid")]
+        public string UserID { get; set; }
+
+        [JsonProperty("currency")]
+        public string Currency { get; set; }
+
+        [JsonProperty("gateway")]
+        public string Gateway { get; set; }
+
+        [JsonProperty("date")]
+        public string Date { get; set; }
+
+        [JsonProperty("description")]
+        public string Description { get; set; }
+
+        [JsonProperty("amountin")]
+        public string AmountIn { get; set; }
+
+        [JsonProperty("fees")]
+        public string Fees { get; set; }
+
+        [JsonProperty("amountout")]
+        public string AmountOut { get; set; }
+
+        [JsonProperty("rate")]
+        public string Rate { get; set; }
+
+        [JsonProperty("transid")]
+        public string TransactionID { get; set; }
+
+        [JsonProperty("invoiceid")]
+        public string InvoiceID { get; set; }
+
+        [JsonProperty("refundid")]
+        public string RefundID { get; set; }
+    }
+
+    public class Transactions
+    {
+
+        [JsonProperty("transaction")]
+        public IList<Transaction> Transaction { get; set; }
+    }
+
+    public class GetInvoice
+    {
+
+        [JsonProperty("result")]
+        public string Result { get; set; }
+
+        [JsonProperty("invoiceid")]
+        public string InvoiceID { get; set; }
+
+        [JsonProperty("invoicenum")]
+        public string InvoiceNumber { get; set; }
+
+        [JsonProperty("userid")]
+        public string UserID { get; set; }
+
+        [JsonProperty("date")]
+        public string Date { get; set; }
+
+        [JsonProperty("duedate")]
+        public string DueDate { get; set; }
+
+        [JsonProperty("datepaid")]
+        public string DatePaid { get; set; }
+
+        [JsonProperty("subtotal")]
+        public string SubTotal { get; set; }
+
+        [JsonProperty("credit")]
+        public string Credit { get; set; }
+
+        [JsonProperty("tax")]
+        public string Tax { get; set; }
+
+        [JsonProperty("tax2")]
+        public string Tax2 { get; set; }
+
+        [JsonProperty("total")]
+        public string Total { get; set; }
+
+        [JsonProperty("balance")]
+        public string Balance { get; set; }
+
+        [JsonProperty("taxrate")]
+        public string TaxRate { get; set; }
+
+        [JsonProperty("taxrate2")]
+        public string TaxRate2 { get; set; }
+
+        [JsonProperty("status")]
+        public string Status { get; set; }
+
+        [JsonProperty("paymentmethod")]
+        public string PaymentMethod { get; set; }
+
+        [JsonProperty("notes")]
+        public string Notes { get; set; }
+
+        [JsonProperty("ccgateway")]
+        public bool CCGateway { get; set; }
+
+        [JsonProperty("items")]
+        public Items Items { get; set; }
+
+        [JsonProperty("transactions")]
+        public Transactions Transactions { get; set; }
+    }
+}
diff --git a/GetInvoices.cs b/GetInvoices.cs
new file mode 100644
index 0000000000000000000000000000000000000000..9a59a375cee285e5b0c9abeb3eaf2325daa66605
--- /dev/null
+++ b/GetInvoices.cs
@@ -0,0 +1,105 @@
+using Newtonsoft.Json;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace WHMCS_API.GetInvoices
+{
+    public class Invoice
+    {
+
+        [JsonProperty("id")]
+        public string ID { get; set; }
+
+        [JsonProperty("userid")]
+        public string UserID { get; set; }
+
+        [JsonProperty("firstname")]
+        public string Firstname { get; set; }
+
+        [JsonProperty("lastname")]
+        public string Lastname { get; set; }
+
+        [JsonProperty("companyname")]
+        public string CompanyName { get; set; }
+
+        [JsonProperty("invoicenum")]
+        public string InvoiceNumber { get; set; }
+
+        [JsonProperty("date")]
+        public string Date { get; set; }
+
+        [JsonProperty("duedate")]
+        public string DueDate { get; set; }
+
+        [JsonProperty("datepaid")]
+        public string DatePaid { get; set; }
+
+        [JsonProperty("subtotal")]
+        public string SubTotal { get; set; }
+
+        [JsonProperty("credit")]
+        public string Credit { get; set; }
+
+        [JsonProperty("tax")]
+        public string Tax { get; set; }
+
+        [JsonProperty("tax2")]
+        public string Tax2 { get; set; }
+
+        [JsonProperty("total")]
+        public string Total { get; set; }
+
+        [JsonProperty("taxrate")]
+        public string TaxRate { get; set; }
+
+        [JsonProperty("taxrate2")]
+        public string TaxRate2 { get; set; }
+
+        [JsonProperty("status")]
+        public string Status { get; set; }
+
+        [JsonProperty("paymentmethod")]
+        public string PaymentMethod { get; set; }
+
+        [JsonProperty("notes")]
+        public string Notes { get; set; }
+
+        [JsonProperty("currencycode")]
+        public string CurrencyCode { get; set; }
+
+        [JsonProperty("currencyprefix")]
+        public string CurrencyPrefix { get; set; }
+
+        [JsonProperty("currencysuffix")]
+        public string CurrencySuffix { get; set; }
+    }
+
+    public class Invoices
+    {
+
+        [JsonProperty("invoice")]
+        public IList<Invoice> Invoice { get; set; }
+    }
+
+    public class GetInvoices
+    {
+
+        [JsonProperty("result")]
+        public string Result { get; set; }
+
+        [JsonProperty("totalresults")]
+        public string TotalResults { get; set; }
+
+        [JsonProperty("startnumber")]
+        public int StartNumber { get; set; }
+
+        [JsonProperty("numreturned")]
+        public int NumberReturned { get; set; }
+
+        [JsonProperty("invoices")]
+        public Invoices Invoices { get; set; }
+    }
+}
diff --git a/NuGet.exe b/NuGet.exe
deleted file mode 100644
index 9f8781de0db12095b1bf32b209c112a2d85704d2..0000000000000000000000000000000000000000
Binary files a/NuGet.exe and /dev/null differ
diff --git a/Properties/AssemblyInfo.cs b/Properties/AssemblyInfo.cs
index 3605e13e64b631c439868303a5aff514ccbb11c5..27d0a97eaa04d9837113fe79ab02d2e76be0767a 100644
--- a/Properties/AssemblyInfo.cs
+++ b/Properties/AssemblyInfo.cs
@@ -32,5 +32,5 @@ using System.Runtime.InteropServices;
 // É possível especificar todos os valores ou usar como padrão os Números de Build e da Revisão
 // usando o '*' como mostrado abaixo:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("0.5.7.1")]
-[assembly: AssemblyFileVersion("0.5.7.1")]
+[assembly: AssemblyVersion("0.6.9")]
+[assembly: AssemblyFileVersion("0.6.9")]
diff --git a/ValidateLogin.cs b/ValidateLogin.cs
index a175f310daf5e0aab100b1f3c161822c89f87d31..008ddd1af5386e846d9ade4b2c7445771f373b56 100644
--- a/ValidateLogin.cs
+++ b/ValidateLogin.cs
@@ -16,6 +16,9 @@ namespace WHMCS_API.ValidateLogin
         [JsonProperty("userid")]
         public int UserID { get; set; }
 
+        [JsonProperty("contactid")]
+        public int ContactID { get; set; }
+
         [JsonProperty("passwordhash")]
         public string PasswordHash { get; set; }
     }
diff --git a/WHMCS API.csproj b/WHMCS API.csproj
index 44573cf7762f29f93cbf2623470cb64acc237587..19504fde239b9ddde5bc20c48402915d124cd8c7 100644
--- a/WHMCS API.csproj	
+++ b/WHMCS API.csproj	
@@ -50,6 +50,8 @@
     <Compile Include="DomainWhoIs.cs" />
     <Compile Include="Enums.cs" />
     <Compile Include="GetClientsProducts.cs" />
+    <Compile Include="GetInvoice.cs" />
+    <Compile Include="GetInvoices.cs" />
     <Compile Include="GetOrders.cs" />
     <Compile Include="GetTransactions.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
diff --git a/WHMCS_API.0.5.7.nupkg b/WHMCS_API.0.5.7.nupkg
new file mode 100644
index 0000000000000000000000000000000000000000..ef53ab90d2629093653b4d52661fd14dd6e397be
Binary files /dev/null and b/WHMCS_API.0.5.7.nupkg differ
diff --git a/bin/Debug/WHMCS API.dll b/bin/Debug/WHMCS API.dll
new file mode 100644
index 0000000000000000000000000000000000000000..33c2fbb0ca22d9368255e4897c0bf4223ee1300c
Binary files /dev/null and b/bin/Debug/WHMCS API.dll differ
diff --git a/bin/Debug/WHMCS API.pdb b/bin/Debug/WHMCS API.pdb
new file mode 100644
index 0000000000000000000000000000000000000000..d46d211c799286a1c32b862dd436629387de75f9
Binary files /dev/null and b/bin/Debug/WHMCS API.pdb differ
diff --git a/bin/Release/WHMCS API.dll b/bin/Release/WHMCS API.dll
index 96df9b5f3e74294e6b285c48f2c7aa47b782b19f..33c2fbb0ca22d9368255e4897c0bf4223ee1300c 100644
Binary files a/bin/Release/WHMCS API.dll and b/bin/Release/WHMCS API.dll differ
diff --git a/bin/Release/WHMCS API.pdb b/bin/Release/WHMCS API.pdb
index d46d211c799286a1c32b862dd436629387de75f9..d4a58632546ee8a333b4d34e5b83800a164b68e4 100644
Binary files a/bin/Release/WHMCS API.pdb and b/bin/Release/WHMCS API.pdb differ
diff --git a/obj/Release/CoreCompileInputs.cache b/obj/Release/CoreCompileInputs.cache
index 65ec8686a2acc6a0f512cc74edebaf5a79a6f181..a95119b6725f79bd05bd19428e27a3b3e98b4c6c 100644
--- a/obj/Release/CoreCompileInputs.cache
+++ b/obj/Release/CoreCompileInputs.cache
@@ -1 +1 @@
-9bdd758f24ddef82f3a54b8ed3aca9e67b7ee3cb
+5f59b426423b1b66e7999b655253504f3f57ee0f
diff --git a/obj/Release/WHMCS API.csprojResolveAssemblyReference.cache b/obj/Release/WHMCS API.csprojResolveAssemblyReference.cache
index 4499eacebc64b2c2b3b4be566416f7ffb8aef69c..77d308a29a105acdb848817cc92f377f20132e0c 100644
Binary files a/obj/Release/WHMCS API.csprojResolveAssemblyReference.cache and b/obj/Release/WHMCS API.csprojResolveAssemblyReference.cache differ
diff --git a/obj/Release/WHMCS API.dll b/obj/Release/WHMCS API.dll
index 96df9b5f3e74294e6b285c48f2c7aa47b782b19f..33c2fbb0ca22d9368255e4897c0bf4223ee1300c 100644
Binary files a/obj/Release/WHMCS API.dll and b/obj/Release/WHMCS API.dll differ
diff --git a/obj/Release/WHMCS API.pdb b/obj/Release/WHMCS API.pdb
index d46d211c799286a1c32b862dd436629387de75f9..d4a58632546ee8a333b4d34e5b83800a164b68e4 100644
Binary files a/obj/Release/WHMCS API.pdb and b/obj/Release/WHMCS API.pdb differ