Server Error in '/' Application.

The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or an illegal character among the padding characters.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.FormatException: The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or an illegal character among the padding characters.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:


[FormatException: The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or an illegal character among the padding characters. ]
   System.Convert.FromBase64_Decode(Char* startInputPtr, Int32 inputLength, Byte* startDestPtr, Int32 destLength) +6226339
   System.Convert.FromBase64CharPtr(Char* inputPtr, Int32 inputLength) +147
   System.Convert.FromBase64String(String s) +50
   BasicLayer.Cryptographies.RijndaelCustom.DecryptStringAES(String cipherText, String sharedSecret) in C:\Users\Balangi\Desktop\LastChangeForWebSite\TaminWebSite\BasicLayer\Cryptographies\RijndaelCustom.cs:97
   BasicLayer.Cryptographies.UrlCryption.Decrypt(String cipherPageUrl) in C:\Users\Balangi\Desktop\LastChangeForWebSite\TaminWebSite\BasicLayer\Cryptographies\UrlCryption.cs:25
   BasicLayer.Extentions.GetQueryStringFromUrl.ToDecryptedQueryString(HttpRequest url, String queryStringItem) in C:\Users\Balangi\Desktop\LastChangeForWebSite\TaminWebSite\BasicLayer\Extentions\GetQueryStringFromUrl.cs:21
   TaminWebSite.Pages.Info.Page_Load(Object sender, EventArgs e) in C:\Users\Balangi\Desktop\LastChangeForWebSite\TaminWebSite\WebSiteTamin\Pages\Info.aspx.cs:34
   System.Web.UI.Control.OnLoad(EventArgs e) +108
   System.Web.UI.Control.LoadRecursive() +90
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1602


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.9224.0