Displaying XML Files to RichTextBox with indentations C# Winforms

I'm writing a program so it will read a xml file and output back in a richtextbox, is there a way to read the file with indents?

Here is how I display it in richtextbox:

if (txtFileDestination != String.Empty)
{
    XmlReader reader = XmlReader.Create(txtFileDestination);

    while (reader.Read())
    {
        switch (reader.NodeType)
        {
            //check each nodetype if exist
            case XmlNodeType.Element:
                //check attributes if exist
                if (reader.HasAttributes)
                {
                    richTextBox1.AppendText("<" + reader.Name + " ");
                    while (reader.MoveToNextAttribute())
                    {
                        richTextBox1.AppendText(reader.Name + " =\"" + reader.Value + "\" ");
                    }
                    richTextBox1.AppendText(">\n");

                }
                else
                {
                    richTextBox1.AppendText("<" + reader.Name + ">\n");
                }

                reader.MoveToElement();

                break;

            case XmlNodeType.Text:
                richTextBox1.AppendText(reader.Value + "\n");
                break;
            case XmlNodeType.CDATA:
                richTextBox1.AppendText("<![CDATA[" + reader.Value + "]]>\n");
                break;
            case XmlNodeType.ProcessingInstruction:
                richTextBox1.AppendText("<?" + reader.Name + " " + reader.Value + "?>\n");
                break;
            case XmlNodeType.Comment:
                richTextBox1.AppendText("<!--" + reader.Value + "-->\n");
                break;
            case XmlNodeType.XmlDeclaration:
                richTextBox1.AppendText("<?" + reader.Value + "?>\n");
                break;
            case XmlNodeType.Document:
                break;
            case XmlNodeType.DocumentType:
                richTextBox1.AppendText("<!DOCTYPE " + reader.Name + " [" + reader.Value + "]\n");
                break;
            case XmlNodeType.EntityReference:
                richTextBox1.AppendText(reader.Name + "\n");
                break;
            case XmlNodeType.EndElement:
                richTextBox1.AppendText("</" + reader.Name + ">\n");
                break;
        }
    }
}