I am unable to create xelement with the unicode character

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C#

XML

LINQ

Unicode

I am unable to create XElement with the string which contains the unicode.

Below code is failing to create XElement. How can I create an XElement with the unicode.

XDocument xDoc = new XDocument(

            new XElement("Pubs", 
                new XElement("Book", 
                    new XElement("Title", "Social Service"),
                    new XElement("Author", "Nagsert")),
                new XElement("Book",
                    new XElement("Title", "Self Motivation"),
                    new XElement("Author", "Srinu")
                    )
                )
        );
      // XElement String contains unicode
            xDoc.Root.Add(new XElement("Book",
          new XElement("Title", "Problem  Is Still Exist"),
            new XElement("Author", "Gazit, Inbar")
        ));e>

What I have tried:

I have gone thorough the unicode problems in c#.
I found that the unicode details for special character

Unicode character Oct Dec Hex HTML
Results 1 - 4 of 4
\x{15} nak negative acknowledge ctrl-u 025 21 0x15 
᷂ combining snake below 016702 7618 0x1DC2 ᷂
⺒ cjk radical snake 027222 11922 0x2E92 ⺒
𐂔 linear b monogram b128 kanako 0200224 65684 0x10094 𐂔