XText.XInline.ToPlainString C# (CSharp) Method

        public override string ToPlainString()
        {
            return ShouldBuildElement() ? Text : string.Empty;
        }

 private void AddChild(StringBuilder stringBuilder, XInline child, bool formatted)
 {
     stringBuilder.Append(formatted ? child.ToString() : child.ToPlainString());
 }