[FormatException: Invalid character in a Base-64 string.]
System.Convert.FromBase64String(String s) +0
System.Web.UI.ObjectStateFormatter.Deserialize(String inputString) +67
System.Web.UI.ObjectStateFormatter.System.Web.UI.IStateFormatter.Deserialize(String serializedState) +4
System.Web.UI.ClientScriptManager.EnsureEventValidationFieldLoaded() +168
[ViewStateException: Invalid viewstate.
Client IP: 59.61.42.5
Port: 3797
User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.2; TencentTraveler ; Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1) ; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022)
ViewState: /wEWAwLXy9ymCwLO4NKNCAK26YbWAcXZV5PFSTLvIjwK8U90TbZnboZx
Referer:
Path: /question/bestanswer.aspx]
[HttpException (0x80004005): The state information is invalid for this page and might be corrupted.]
System.Web.UI.ViewStateException.ThrowError(Exception inner, String persistedState, String errorPageMessage, Boolean macValidationError) +116
System.Web.UI.ClientScriptManager.EnsureEventValidationFieldLoaded() +205
System.Web.UI.ClientScriptManager.ValidateEvent(String uniqueId, String argument) +66
System.Web.UI.Control.ValidateEvent(String uniqueID, String eventArgument) +108
System.Web.UI.HtmlControls.HtmlTextArea.LoadPostData(String postDataKey, NameValueCollection postCollection) +87
System.Web.UI.HtmlControls.HtmlTextArea.System.Web.UI.IPostBackDataHandler.LoadPostData(String postDataKey, NameValueCollection postCollection) +11
System.Web.UI.Page.ProcessPostData(NameValueCollection postData, Boolean fBeforeLoad) +353
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +7139
System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +213
System.Web.UI.Page.ProcessRequest() +86
System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context) +18
System.Web.UI.Page.ProcessRequest(HttpContext context) +49
ASP.PageClass.ProcessRequest(HttpContext context) in c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\root\e082444b\1bcfb4cd\App_Web_rvmqpysa.0.cs:0
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +362
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +64
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