XmlNodeList nodeList = xmlDoc.GetElementsByTagName("Team");
        foreach (XmlNode xNode in nodeList)
        {
            foreach (var item in xNode)
            {
                lstRegPartiData.Items.Add(xNode.InnerText + item);
            }
        }

<Participants>
              <Participant>
                <DateTime>21.04.2018</DateTime>
                <FullName>N1</FullName>
                <Email>email@gmail.com</Email>
                <Phone>123456789</Phone>
                <DateOfBirth>00/00/1988</DateOfBirth>
                <Team>Team1</Team>
                <MainWeapon>T1</MainWeapon>
                <MainWeaponChrono>120-130 ms</MainWeaponChrono>
                <WeaponClass>C1</WeaponClass>
                <Comment>Hello World</Comment>
              </Participant>
              <Participant>
                <DateTime>21.04.2018</DateTime>
                <FullName>N1</FullName>
                <Email>email@gmail.com</Email>
                <Phone>987654321</Phone>
                <DateOfBirth>00/00/1988</DateOfBirth>
                <Team>Team1</Team>
                <MainWeapon>T1</MainWeapon>
                <MainWeaponChrono>120-130 ms</MainWeaponChrono>
                <WeaponClass>C1</WeaponClass>
                <Comment>My Comment</Comment>
              </Participant>
               <Participant>
                <DateTime>21.04.2018</DateTime>
                <FullName>N1</FullName>
                <Email>email@gmail.com</Email>
                <Phone>123456789</Phone>
                <DateOfBirth>00/00/1988</DateOfBirth>
                <Team>Team1</Team>
                <MainWeapon>T1</MainWeapon>
                <MainWeaponChrono>120-130 ms</MainWeaponChrono>
                <WeaponClass>C1</WeaponClass>
                <Comment>Hello World</Comment>
              </Participant>
            </Participants>