Server Error in '/' Application.

Value cannot be null.
Parameter name: value

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.ArgumentNullException: Value cannot be null.
Parameter name: value

Source Error:


Line 9:  	public void ProcessRequest(HttpContext context)
Line 10: 	{
Line 11: 		string msg = DateTime.Now.ToString("HH:mm:ss")
Line 12: 			+ " " + context.Request.UserHostAddress + " " + string.Join(",", context.Request.UserLanguages)
Line 13: 			+ "\r\n" + context.Request.UserAgent

Source File: c:\inetpub\wwwroot\zchat.com\download\download.ashx    Line: 11

Stack Trace:


[ArgumentNullException: Value cannot be null.
Parameter name: value]
   System.String.Join(String separator, String[] value) +14414114
   Handler.ProcessRequest(HttpContext context) in c:\inetpub\wwwroot\zchat.com\download\download.ashx:11
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +542
   System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) +75
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +93


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4676.0