I have to deserialize the below xml file. What should be the class for this? Please help.

/// <remarks />
    [System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true)]
    [System.Xml.Serialization.XmlRootAttribute(Namespace = "", IsNullable = false)]
    public partial class validationrule
    {

        private validationruleFieldname[] fieldnameField;

        /// <remarks />
        [System.Xml.Serialization.XmlElementAttribute("fieldname")]
        public validationruleFieldname[] fieldname
        {
            get
            {
                return this.fieldnameField;
            }
            set
            {
                this.fieldnameField = value;
            }
        }
    }

    /// <remarks />
    [System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true)]
    public partial class validationruleFieldname
    {

        private byte entitytypeField;

        private string nameField;

        private string isrequiredField;

        private string isrequirederrormessageField;

        private string datatypeField;

        private string datatypeerrormessageField;

        /// <remarks />
        public byte entitytype
        {
            get
            {
                return this.entitytypeField;
            }
            set
            {
                this.entitytypeField = value;
            }
        }

        /// <remarks />
        public string name
        {
            get
            {
                return this.nameField;
            }
            set
            {
                this.nameField = value;
            }
        }

        /// <remarks />
        public string isrequired
        {
            get
            {
                return this.isrequiredField;
            }
            set
            {
                this.isrequiredField = value;
            }
        }

        /// <remarks />
        public string isrequirederrormessage
        {
            get
            {
                return this.isrequirederrormessageField;
            }
            set
            {
                this.isrequirederrormessageField = value;
            }
        }

        /// <remarks />
        public string datatype
        {
            get
            {
                return this.datatypeField;
            }
            set
            {
                this.datatypeField = value;
            }
        }

        /// <remarks />
        public string datatypeerrormessage
        {
            get
            {
                return this.datatypeerrormessageField;
            }
            set
            {
                this.datatypeerrormessageField = value;
            }
        }
    }

[Serializable()]
public class FieldName
{
    [System.Xml.Serialization.XmlElement("EntityType")]
    public string EntityType { get; set; }

    [System.Xml.Serialization.XmlElement("Name")]
    public string Name { get; set; }

    ...
}

[Serializable()]
[System.Xml.Serialization.XmlRoot("validationrule")]
public class validationrules
{
    [XmlArray("FieldName")]
    [XmlArrayItem("FieldName", typeof(FieldName))]
    public FieldName[] fieldNames { get; set; }
}

// the below code may be added into your deserialize method
validationrule rules= null;
string path = "xmlpath.xml";

XmlSerializer serializer = new XmlSerializer(typeof(validationrules));

using (XmlReader reader = XmlReader.Create(path))
    {
        rules =  serializer.Deserialize(reader) as validationrules;
    }