when save xml error occur as it is being used by another pro

Question

when save xml error occur as it is being used by another process.

 

XmlDocument XDOC = new XmlDocument();

XDOC.Load(System.Web.HttpContext.Current.Server.MapPath("~/XmlFiles/Blog.xml"));

XmlNode RootNode = XDOC.SelectSingleNode("//Blogs");

XmlNode childnode = XDOC.SelectSingleNode("/Blogs/IDs");

//check whether childnode exist or not.

if (childnode != null)

childnode.ParentNode.RemoveChild(childnode);

XmlElement XEle = XDOC.CreateElement("IDs");

XEle.SetAttribute("id", Convert.ToString(ID));

RootNode.AppendChild(XEle);

XDOC.Save(System.Web.HttpContext.Current.Server.MapPath("~/XmlFiles/Blog.xml"));(here getting error)