using System;

using System.Linq;

using System.Xml.Linq;

​

public class Program

{

    public static void Main(string[] args)

    {

        const string xml =

            @"<ArrayOfAutoReportXML>  

    <AutoReportXML ReportName=""Report1"" ReportID=""1"" />

    <AutoReportXML ReportName=""Report2"" ReportID=""2"" />

    <AutoReportXML ReportName=""Report3"" ReportID=""3"" />

    <AutoReportXML ReportName=""Report4"" ReportID=""4"" />

    <AutoReportXML ReportName=""Report5"" ReportID=""5"" />

</ArrayOfAutoReportXML>";

​

        var doc = XDocument.Parse(xml);

​

        var report1Exists = doc

            .Descendants("AutoReportXML")

            .Attributes("ReportName")

            .Any(x => x.Value == "Report1");

​

        Console.WriteLine("Report1 Exists: " + report1Exists);

​

        var report2Exists = doc

            .Descendants("AutoReportXML")

             .Any(x => (string)x.Attribute("ReportName") == "Report2" && 

                       (int)x.Attribute("ReportID") == 2);

        Console.WriteLine("Report2 Exists: " + report2Exists);

        var report6Exists = doc

            .Descendants("AutoReportXML")

            .Attributes("ReportName")

            .Any(x => x.Value == "Report6");

​

        Console.WriteLine("Report6 Exists: " + report6Exists);

    }    

}