System.Web.Configuration.WebConfigurationManager.MapPath C# (CSharp) Method

		static string MapPath (HttpRequest req, string virtualPath)
		{
			if (req != null)
				return req.MapPath (virtualPath);

			string appRoot = HttpRuntime.AppDomainAppVirtualPath;
			if (!String.IsNullOrEmpty (appRoot) && virtualPath.StartsWith (appRoot, StringComparison.Ordinal)) {
				if (String.Compare (virtualPath, appRoot, StringComparison.Ordinal) == 0)
					return HttpRuntime.AppDomainAppPath;
				return UrlUtils.Combine (HttpRuntime.AppDomainAppPath, virtualPath.Substring (appRoot.Length));
			}
			
			return null;
		}