OracleInternal.MTS.DTCPSPEManager”的类型初始值设定项引发异常

---错误提示：

System.TypeInitializationException: “OracleInternal.MTS.DTCPSPEManager”的类型初始值设定项引发异常。 ---> System.IO.FileNotFoundException: 未能加载文件或程序集“Oracle.ManagedDataAccessDTC, Version=4.121.2.0, Culture=neutral, PublicKeyToken=89b483f429c47342”或它的某一个依赖项。系统找不到指定的文件。
在 System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
在 System.Reflection.RuntimeAssembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
在 System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, RuntimeAssembly reqAssembly, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
在 System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean forIntrospection)
在 System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection)
在 System.Reflection.Assembly.Load(String assemblyString)
在 OracleInternal.MTS.DTCPSPEManager..cctor()

-----------用的EF。解决方案是缺少了Framework，安装一个即可。