我能够成功连接到Oracle数据库，如下图所示：

但是，当我尝试连接并通过代码进行查询时，我收到错误：
“

ERROR:  Message:System.TypeInitializationException: The type initializer for 'Oracle.DataAccess.Client.OracleConnection' threw an exception. ---> System.DllNotFoundException: Unable to load DLL 'OraOps12.dll': The specified module could not be found. (Exception from HRESULT: 0x8007007E)
   at Oracle.DataAccess.Client.OpsInit.CheckVersionCompatibility(String version)
   at Oracle.DataAccess.Client.OracleInit.Initialize()
   at Oracle.DataAccess.Client.OracleConnection..cctor()
   --- End of inner exception stack trace ---
   at Oracle.DataAccess.Client.OracleConnection..ctor(String connectionString)

“
在Oracle连接行上：

string oradb = "Data Source=" + oracleDataSource + ";User Id=" + oracleUserID + ";Password=" + oraclePassword + ";";

OracleConnection conn = new OracleConnection(oradb); <----error thrown here

凭据与在服务器资源管理器中输入的凭据相同
我该如何解决这个问题？