C#从证书存储区读取证书

 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>
         /// 根据私钥证书得到证书实体，得到实体后可以根据其公钥和私钥进行加解密
         /// 加解密函数使用DEncrypt的RSACryption类
         /// </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>
         /// 从证书存储区读取证书
         /// </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);//弹出框,可以选择需要的证书
             X509Certificate2Collection findResult = fcollection.Find(X509FindType.FindBySerialNumber, "BFA9E49C5E44EA914BA64288CA6B8348", false);//有多个重载,可以用不同的方法查询

             return findResult[];
         }
     }
 }