using System;

using System.Linq;

using System.Xml;

using System.Xml.Linq;

using System.Collections;

public class Program

{

    public static void Main()

    {

        string strXml1 = @"<?xml version=""1.0"" encoding=""UTF-8""?>

<soapenv:Envelope xmlns:soapenv=""http://schemas.xmlsoap.org/soap/envelope/""

                  xmlns:urn=""urn:sap-com:document:sap:rfc:functions"">

   <soapenv:Header/>

   <soapenv:Body>

      <urn:Z_GET_BATCH_QUANTITY>

         <I_BATCH>2095109</I_BATCH>

      </urn:Z_GET_BATCH_QUANTITY>

   </soapenv:Body>

</soapenv:Envelope>";

string strXml2 = @"<?xml version=""1.0"" encoding=""ISO-8859-1""?>

<soap-env:Envelope xmlns:soap-env=""http://schemas.xmlsoap.org/soap/envelope/"">

   <soap-env:Header/>

   <soap-env:Body>

      <p1:Z_PROCESS_MESS_UPLOAD xmlns:p1=""urn:sap-com:document:sap:rfc:functions"">

         <RFC_DESTINATION_FOR_TRFC>NONE</RFC_DESTINATION_FOR_TRFC>

         <MSHD>

            <item>

               <MSID>1</MSID>

               <WERK>1010</WERK>

               <MSCLA>OP_MWEIG</MSCLA>

               <SEDAT>2022-09-07</SEDAT>

               <SEUZT>15:38:28</SEUZT>

               <SOURCE>POMSNET</SOURCE>

            </item>

         </MSHD>

         <MSEL>

            <item>

               <MSID>1</MSID>

               <ATNAM>PPPI_PROCESS_ORDER</ATNAM>

               <ATWRT>000010393115</ATWRT>

               <ATFOR>CHAR</ATFOR>

            </item>

            <item>

               <MSID>1</MSID>

               <ATNAM>PPPI_EVENT_DATE</ATNAM>

               <ATWRT>20220907</ATWRT>

               <ATFOR>DATE</ATFOR>

            </item>

            <item>

               <MSID>1</MSID>

               <ATNAM>PPPI_EVENT_TIME</ATNAM>

               <ATWRT>153828</ATWRT>

               <ATFOR>TIME</ATFOR>

            </item>

            <item>

               <MSID>1</MSID>

               <ATNAM>PPPI_BATCH</ATNAM>

               <ATWRT>2083931</ATWRT>

               <ATFOR>CHAR</ATFOR>

            </item>

            <item>

               <MSID>1</MSID>

               <ATNAM>PPPI_CONTROL_RECIPE</ATNAM>

               <ATWRT/>

               <ATFOR>CHAR</ATFOR>

            </item>

            <item>

               <MSID>1</MSID>

               <ATNAM>PPPI_OPERATION</ATNAM>

               <ATWRT>1000</ATWRT>

               <ATFOR>CHAR</ATFOR>

            </item>

            <item>

               <MSID>1</MSID>

               <ATNAM>PPPI_PHASE</ATNAM>

               <ATWRT>1540</ATWRT>

               <ATFOR>CHAR</ATFOR>

            </item>

            <item>

               <MSID>1</MSID>

               <ATNAM>OP_QTY_AUTOM</ATNAM>

               <ATWRT>2,998</ATWRT>

               <ATFOR>NUM</ATFOR>

            </item>

            <item>

               <MSID>1</MSID>

               <ATNAM>OP_UNIT_AUTOM</ATNAM>

               <ATWRT>KG</ATWRT>

               <ATFOR>CHAR</ATFOR>

            </item>

            <item>

               <MSID>1</MSID>

               <ATNAM>PPPI_MATERIAL</ATNAM>

               <ATWRT>000000000000108260</ATWRT>

               <ATFOR>CHAR</ATFOR>

            </item>

            <item>

               <MSID>1</MSID>

               <ATNAM>PPPI_MATERIAL_ITEM</ATNAM>

               <ATWRT>0050</ATWRT>

               <ATFOR>CHAR</ATFOR>

            </item>

            <item>

               <MSID>1</MSID>

               <ATNAM>PPPI_RESERVATION</ATNAM>

               <ATWRT>0165629370</ATWRT>

               <ATFOR>CHAR</ATFOR>

            </item>

            <item>

               <MSID>1</MSID>

               <ATNAM>PPPI_RESERVATION_ITEM</ATNAM>

               <ATWRT>0032</ATWRT>

               <ATFOR>CHAR</ATFOR>

            </item>

            <item>

               <MSID>1</MSID>

               <ATNAM>OP_ORI_RES_ITEM</ATNAM>

               <ATWRT>0000000032</ATWRT>

               <ATFOR>CHAR</ATFOR>

            </item>

         </MSEL>

         <TLINES>

            <item/>

         </TLINES>

      </p1:Z_PROCESS_MESS_UPLOAD>

   </soap-env:Body>

</soap-env:Envelope>";  

string strXml3 = @"<?xml version=""1.0"" encoding=""UTF-8""?>

<soap-env:Envelope xmlns:soap-env=""http://schemas.xmlsoap.org/soap/envelope/"">

   <soap-env:Header/>

   <soap-env:Body>

      <ZPROCORDCONF_CREATETIME201>

         <IDOC BEGIN=""1"">

            <EDI_DC40 SEGMENT=""1"">

               <DOCNUM>bfef8819-83be-4fd9-85db-af0902c0bf30</DOCNUM>

               <IDOCTYP>ZPROCORDCONF_CREATETIME201</IDOCTYP>

               <MESTYP>ZPROCORDCONF_CREATETIME2</MESTYP>

               <RCVPOR>SAPOSX</RCVPOR>

               <RCVPRN>OSX070</RCVPRN>

               <RCVPRT>LS</RCVPRT>

               <SNDPOR>FRENDS</SNDPOR>

               <SNDPRT>LS</SNDPRT>

               <SNDPFC>LS</SNDPFC>

               <SNDPRN>MES_1010</SNDPRN>

            </EDI_DC40>

            <Z1ZPROCORDCONF_CREATETIME2 SEGMENT=""1"">

               <Z1BP_PI_TIMETICKET1 SEGMENT=""1"">

                  <ORDERID>000010393112</ORDERID>

                  <PHASE>1500</PHASE>

                  <FIN_CONF/>

                  <PLANT>1010</PLANT>

               </Z1BP_PI_TIMETICKET1>

            </Z1ZPROCORDCONF_CREATETIME2>

         </IDOC>

      </ZPROCORDCONF_CREATETIME201>

   </soap-env:Body>

</soap-env:Envelope>";

    string strXml = "<soap-env:Envelope></soap-env:Envelope";

    string type = "empty";

        try {

        XDocument xDoc = XDocument.Parse(strXml);

        XNamespace soapenv="http://schemas.xmlsoap.org/soap/envelope/";

        XElement root = xDoc.Element(soapenv + "Envelope");

        //The element "Envelope" with the namespace must be a root element

        if (root.Element(soapenv + "Header") != null) {

            //The element "Header" with the namespace must be found

            XElement elemBody = root.Element(soapenv + "Body");

            //The element "Body" with the namespace must be found

            XElement elemFunc = elemBody.Elements().FirstOrDefault();

            if (XElement.Parse(elemFunc.ToString()).GetPrefixOfNamespace("urn:sap-com:document:sap:rfc:functions") != null) {

                //The function element with the namespace is the child element of the element "Body" 

                type = "rfc";

            } else if (elemBody.Descendants("IDOC").FirstOrDefault().Element("EDI_DC40") != null) {

                //The element "IDOC" is under the element "Body" and the element EDI_DC40 is the child elemnt of the element "IDOC"

                type = "idoc";

            }

        }

    } catch {

    }

    Console.WriteLine(type);

    }

}