Sharepoint2010: How to reset InfoPath Signatures in a C# Workflow

gistfile1.cs

SPSecurity.RunWithElevatedPrivileges(delegate()
{
    SPFile formFile = workflowProperties.Item.File;
    MemoryStream ms = new MemoryStream(formFile.OpenBinary());
    XmlTextReader rdr = new XmlTextReader(ms);
    XmlDocument xmlDoc = new XmlDocument();
    xmlDoc.Load(rdr);
    rdr.Close();
    ms.Close();
    XmlNamespaceManager nsm = new XmlNamespaceManager(xmlDoc.NameTable);
    //  FYI, this was the schema I found for mine, for whatever reason yours maybe different, but it should be located as an attribute of your Document
    String schemaUri = xmlDoc.DocumentElement.GetAttributeNode("xmlns:my") != null ? xmlDoc.DocumentElement.GetAttributeNode("xmlns:my").Value : "http://schemas.microsoft.com/office/infopath/2003/myXSD/2012-09-04T20:19:31";
    nsm.AddNamespace("my", schemaUri);
    XmlNode nodeSignatureCollection = xmlDoc.DocumentElement.SelectSingleNode("my:signatures1", nsm);
    if (nodeSignatureCollection != null)
    {
        if (nodeSignatureCollection.HasChildNodes)
        {
            foreach (XmlNode nodeSignature in nodeSignatureCollection.ChildNodes)
            {
                //  HERE IT IS!!!
                if (nodeSignature.HasChildNodes && !nodeSignature.IsReadOnly) nodeSignature.RemoveAll();
            }
        }
    }
    byte[] xmlData = System.Text.Encoding.UTF8.GetBytes(xmlDoc.OuterXml);
    formFile.SaveBinary(xmlData);
    formFile.Update();
});