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Sobeedeki çarıma bir haftadan beri giremiyorum.Karşıma bu yazı çıkıyor.Yardım edermisiniz? Server Error in '/' Application.
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Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.
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.Web.HttpException: Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.

Source Error:

The source code that generated this unhandled exception can only be shown when compiled in debug mode. To enable this, please follow one of the below steps, then request the URL:

1. Add a "Debug=true" directive at the top of the file that generated the error. Example:

<%@ Page Language="C#" Debug="true" %>

or:

2) Add the following section to the configuration file of your application:

<configuration>
<system.web>
<compilation debug="true"/>
</system.web>
</configuration>

Note that this second technique will cause all files within a given application to be compiled in debug mode. The first technique will cause only that particular file to be compiled in debug mode.

Important: Running applications in debug mode does incur a memory/performance overhead. You should make sure that an application has debugging disabled before deploying into production scenario.

Stack Trace:


[HttpException (0x80004005): Unable to validate data.]
System.Web.Configuration.MachineKeySection.GetDecodedData(Byte[] buf, Byte[] modifier, Int32 start, Int32 length, Int32& dataLength) +10985717
System.Web.UI.ObjectStateFormatter.Deserialize(String inputString) +295

[ViewStateException: Invalid viewstate.
Client IP: 88.227.122.145
Port: 2362
User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 2.0.50727)
ViewState: /wEPDwULLTE4Mzk0NzUxNTEPZBYCAgEPZBYEZg8PZBYEHgdvbkZvY3VzBSNUeHRGb2N1cyh0aGlzLCdDZXAgTm8gdmV5YSBFbWFpbCcpOx4Gb25CbHVyBSJUeHRCbHVyKHRoaXMsJ0NlcCBObyB2ZXlhIEVtYWlsJyk7ZAIBDw9kFgYfAAUYVHh0Rm9jdXModGhpcywnxZ5pZnJlJyk7HwEFF1R4dEJsdXIodGhpcywnxZ5pZnJlJyk7HgV2YWx1ZQUGxZ5pZnJlZGTMHjmxX8LTNW1JKOIbigVV+3NYQA==
Referer: http://www.istanbuloyun.com/logingame.aspx
Path: /logingame.aspx]

[HttpException (0x80004005): Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.]
System.Web.UI.ViewStateException.ThrowError(Exception inner, String persistedState, String errorPageMessage, Boolean macValidationError) +148
System.Web.UI.ObjectStateFormatter.Deserialize(String inputString) +10958997
System.Web.UI.Util.DeserializeWithAssert(IStateFormatter formatter, String serializedState) +59
System.Web.UI.HiddenFieldPageStatePersister.Load() +10959096
System.Web.UI.Page.LoadPageStateFromPersistenceMedium() +11042856
System.Web.UI.Page.LoadAllState() +46
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +11038375
System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +11037914
System.Web.UI.Page.ProcessRequest() +91
System.Web.UI.Page.ProcessRequest(HttpContext context) +240
ASP.logingame_aspx.ProcessRequest(HttpContext context) +9
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +599
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +171

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