Error: The XML declaration must be the first node in the document

Question

I am getting \"Unexpected XML declaration. The XML declaration must be the first node in the document, and no white space characters are allowed to appear before it\" error

Answer 1

I'm using the following function to remove whitespace from xml:

public static void DoRemovespace(string strFile)
    {
        string str = System.IO.File.ReadAllText(strFile);
        str = str.Replace("\n", "");
        str = str.Replace("\r", "");
        Regex regex = new Regex(@">\s*<");
        string cleanedXml = regex.Replace(str, "><");
        System.IO.File.WriteAllText(strFile, cleanedXml);

    }