Reading XML tag Values using Programmatically

Get the XML tag values 

 1. Create Constants.xml file and create the tags in the below format.

<?xml version="1.0" encoding="utf-8" ?>
<ConstantsXML>  //This is used as identifier to read the data from inside of the identified tag from Code
<Constants>
<EmpName>Employee Name</EmpName>
<EmployeeID>Employee Id</EmployeeID>
<EmpDepartment>Department</EmpDepartment>
</Constants>
</ConstantsXML>

2. Declaring the Variables

  #region Members

        static String elementValue;
        private static readonly String ConstantNodeIdentifier = "ConstantsXML";
        private static XDocument m_sourceDocument;

  #endregion

 3. Method to Read the XML Document form the Specified Path

 static Constant()
        {
            try
            {
                if (System.IO.File.Exists(HostingEnvironment.MapPath("~/Common/Configuration.xml")))
                {
                    m_sourceDocument = XDocument.Load(HostingEnvironment.MapPath("~/Common/Configuration.xml")); //XDocument calls the Step four to read the data from the XML File
                }
            }
            catch (ArgumentNullException ex)
            {
                throw ex;
            }
        }

 4.  To Read the XML Document data.

  static XDocument LoadFromStream(Stream stream)
        {
            try
            {
                using (XmlReader reader = XmlReader.Create(stream))
                {
                    return XDocument.Load(reader);
                }
            }
            catch (ArgumentNullException ex)
            {
                throw ex;
            }

        }

 5. Main the Function to return the XML tag data  to the called function and store it in a variable
        /// <summary>
        /// Get the Constants from xml file 
        /// </summary>
        /// <param name="formName">formname</param>
        /// <param name="keyName">ElementName</param>
        /// <returns>ElementValue</returns>
        public static String GetElementValue(String formName, String keyName)
        {
            try
            {
                if (m_sourceDocument != null)
                {
                    elementValue = m_sourceDocument.Element(ConstantNodeIdentifier).Element(formName).Element(keyName).Value;
                }
            }
            catch (ArgumentNullException ex)
            {
                throw ex;
            }
            return elementValue;

        }

 6. Declare the variables to get the data from the XML tag

 static String xmlEmpName = GetElementValue("Constants", "EmpName");

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