C#從證書存儲區讀取證書

using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Cryptography.X509Certificates;
using System.Text;
using System.Threading.Tasks;
using System.Web;


namespace makecertdemo
{
    public class MakecertHelper
    {
        /// <summary>   
        /// 根據私鑰證書得到證書實體，得到實體后可以根據其公鑰和私鑰進行加解密   
        /// 加解密函數使用DEncrypt的RSACryption類   
        /// </summary>   
        /// <param name="pfxFileName"></param>   
        /// <param name="password"></param>   
        /// <returns></returns>   
        public static X509Certificate2 GetCertificateFromPfxFile(string pfxFileName,
            string password)
        {
            try
            {
                return new X509Certificate2(pfxFileName, password, X509KeyStorageFlags.Exportable);
            }
            catch (Exception e)
            {
                return null;
            }
        }

        /// <summary>
        /// 從證書存儲區讀取證書
        /// </summary>
        /// <returns></returns>
        public static X509Certificate2 GetCertificateFromHost()
        {
            X509Store store = new X509Store("MY", StoreLocation.CurrentUser);
            store.Open(OpenFlags.OpenExistingOnly | OpenFlags.ReadWrite);
            //Put certificates from the store into a collection so user can select one.
            X509Certificate2Collection fcollection = (X509Certificate2Collection)store.Certificates;
            //X509Certificate2Collection collection = X509Certificate2UI.SelectFromCollection(fcollection, "Select an X509 Certificate", "Choose a certificate to examine.", X509SelectionFlag.MultiSelection);//彈出框,可以選擇需要的證書
            X509Certificate2Collection findResult = fcollection.Find(X509FindType.FindBySerialNumber, "BFA9E49C5E44EA914BA64288CA6B8348", false);//有多個重載,可以用不同的方法查詢

            return findResult[0];
        }
    }
}