/// <summary>
        ///     This API supports the Entity Framework infrastructure and is not intended to be used directly from your code.
        /// </summary>
        /// <param name="xobject">This API supports the Entity Framework infrastructure and is not intended to be used directly from your code.</param>
        /// <returns>This API supports the Entity Framework infrastructure and is not intended to be used directly from your code.</returns>
        public override TextSpan GetTextSpan(XObject xobject)
        {
            var el = xobject as XElement;

            var ts = new TextSpan();

            if (el != null)
            {
                var etr = el.GetTextRange();
                if (etr != null)
                {
                    // subtract 1 from these, since VS uses zero-based column & line numbers
                    ts.iStartLine = etr.OpenStartLine - 1;
                    ts.iStartIndex = etr.OpenStartColumn - 1;
                    ts.iEndLine = etr.CloseEndLine - 1;
                    // don't subtrace 1 from here, since the XML editor treats the "closing" column is the first
                    // column after the ">" bracket
                    ts.iEndIndex = etr.CloseEndColumn;
                }
            }
            else
            {
                var atr = xobject.GetTextRange();
                if (atr != null)
                {
                    // subtract 1 from these, since VS uses zero-based column & line numbers
                    ts.iStartLine = atr.OpenStartLine - 1;
                    ts.iStartIndex = atr.OpenStartColumn - 1;
                    ts.iEndLine = atr.CloseEndLine - 1;
                    // don't subtrace 1 from here, since the XML editor treats the "closing" column is the first
                    // column after the ">" bracket
                    ts.iEndIndex = atr.CloseEndColumn;
                }
                else
                {
                    if (xobject.Parent != null
                        && xobject.Parent != xobject)
                    {
                        // fallback case.  If we couldn't get a text range for this element, use the one for the parent.
                        return GetTextSpan(xobject.Parent);
                    }
                }
            }

            return ts;
        }