AjaxControlToolkit.Animation.GetLineNumber C# (CSharp) Method

        static int GetLineNumber(string source, string tag)
        {
            // We'll manually walk through the source using an XmlTextReader
            // so we can get the line number
            using(var reader = new XmlTextReader(new StringReader(source))) {
                if(reader.Read()) {
                    // Loop though all the top level children
                    while(reader.Read()) {
                        if(String.Compare(reader.Name, tag, StringComparison.OrdinalIgnoreCase) == 0)
                            return reader.LineNumber;
                        // If this node has children, ignore them all
                        if(reader.NodeType == XmlNodeType.Element && !reader.IsEmptyElement)
                            reader.Skip();
                    }
                }
            }

            // If we can't find it, just use the first line
            return 1;
        }