Server Error in '/' Application.

Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index

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.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index

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: 


[ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index]
   KCCheckin.Public.Common.PublicPageBase.HandleException(Exception e) in C:\ProgramData\Jenkins\.jenkins\workspace\Pipelines\Build KidCheck.Net\webroot\Common\PublicPageBase.cs:156
   KCCheckin.Public.webforms.EventRegistration.ProcessPayment() in C:\ProgramData\Jenkins\.jenkins\workspace\Pipelines\Build KidCheck.Net\webroot\webforms\EventRegistration.aspx.cs:1818
   KCCheckin.Public.webforms.EventRegistration.NextState() in C:\ProgramData\Jenkins\.jenkins\workspace\Pipelines\Build KidCheck.Net\webroot\webforms\EventRegistration.aspx.cs:762
   KCCheckin.Public.webforms.EventRegistration.btnNext_Click(Object sender, EventArgs e) in C:\ProgramData\Jenkins\.jenkins\workspace\Pipelines\Build KidCheck.Net\webroot\webforms\EventRegistration.aspx.cs:810
   Telerik.Web.UI.RadButton.OnClick(ButtonClickEventArgs e) +129
   Telerik.Web.UI.RadButton.RaisePostBackEvent(String eventArgument) +299
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5028