Umesh.Gandhi
Hi Tapan,
Apart from the accesse rights to shared loaction, If the name of MXL your trying to write is always going to be 'vb_Alias.xml' then make sure the file that you are trying to overwrite is not read only.
I tried to replicate the exception that you where getting. Wrote following test code. Executed it for first time and generated the file, then I went and marked the file as read only and again executed the code but this time I got the error that you have mentioned.
XmlDocument
objXD = new XmlDocument();
objXD.LoadXml("<Root><Test1>1</Test1></Root>");
objXD.Save(@"D:\Umesh\Test.xml");
Apart from the accesse rights to shared location check if your generated file is getting marked as read only.
Regards,
Umesh.