Calculating hash values in Windows Metro Style applications using C#

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.Security.Cryptography;
using Windows.Security.Cryptography.Core;
using Windows.Storage.Streams;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;

// The Blank Page item template is documented at http://go.microsoft.com/fwlink/?LinkId=234238

namespace HashSampleMetro
{
    /// <summary>
    /// An empty page that can be used on its own or navigated to within a Frame.
    /// </summary>
    public sealed partial class MainPage : Page
    {
        public MainPage()
        {
            this.InitializeComponent();
        }

        /// <summary>
        /// Invoked when this page is about to be displayed in a Frame.
        /// </summary>
        /// <param name="e">Event data that describes how this page was reached.  The Parameter
        /// property is typically used to configure the page.</param>
        protected override void OnNavigatedTo(NavigationEventArgs e)
        {
        }


        /// <summary>
        /// This Method whill create a  Hash for a Given string
        /// </summary>
        /// <param name="DataString"></param>
        /// <returns></returns>
        internal string CalculateHashForString(string DataString,string hashType )
        {
            string dataHash = string.Empty;

            if (string.IsNullOrWhiteSpace(DataString))
                return null;

            if (string.IsNullOrWhiteSpace(hashType))
                hashType = "MD5";
            try
            {
                ///Hash Algorithm Provider is Created 
                HashAlgorithmProvider Algorithm = HashAlgorithmProvider.OpenAlgorithm(hashType);
                ///Creating a Buffer Stream using the Cryptographic Buffer class and UTF8 encoding 
                IBuffer vector = CryptographicBuffer.ConvertStringToBinary(DataString, BinaryStringEncoding.Utf8);


                IBuffer digest = Algorithm.HashData(vector);////Hashing The Data 

                if (digest.Length != Algorithm.HashLength)
                {
                    throw new System.InvalidOperationException("HashAlgorithmProvider failed to generate a hash of proper length!");            
                }else{

                    dataHash = CryptographicBuffer.EncodeToHexString(digest);//Encoding it to a Hex String 
                return dataHash;
                }
            }
            catch (Exception ex)
            {
                ///
            }

            return null;
        }


        private void Button_Click_1(object sender, RoutedEventArgs e)
        {
           try
           {
               if(!string.IsNullOrWhiteSpace(txtValue.Text))
               {

                  // Hash Types Supported
                     ///MD5
                    ///SHA1
                    ///SHA256
                    ///SHA384
                    ///SHA512

                   string hashAlgorithm = "SHA256";
                   lblAlg.Text = hashAlgorithm;
                   lblResult.Text = CalculateHashForString(txtValue.Text, hashAlgorithm);

               }

           }catch(Exception ex)
           {

           }
        }
    }
}