在用微软企业库连接SqlServerCe不成功

我在项目中用微软企业库的方式连接SqlServer Ce不成功，但是连接MSSQL没问题；
我想知道微软企业库是否能连接SqlServer Ce；

配置文件

 <add name="CS_Telecom" connectionString="Data Source=D:\EWS_Project\DataBase\MyDatabase#1.sdf;Password=123456" providerName="Microsoft.SqlServerCe.Client"/>

代码

        public virtual void CreateDatabase()
        {

            if (string.IsNullOrEmpty(DBName))
            {
                this.db = Microsoft.Practices.EnterpriseLibrary.Data.DatabaseFactory.CreateDatabase();

            }
            else
            {
                this.db = Microsoft.Practices.EnterpriseLibrary.Data.DatabaseFactory.CreateDatabase(DBName);
            }
        }

错误信息

Activation error occured while trying to get instance of type Database, key "CS_Telecom"

把配置文件改成，就解决了

  <add name="CS_Telecom" connectionString="Data Source=D:\EWS_Project\DataBase\MyDatabase#1.sdf;Password=123456" providerName="System.Data.SqlServerCe.3.5"/>

providerName="System.Data.SqlServerCe.3.5"