属性由于保护级别而无法访问？

Question

这是一个错误的显示就行了：

public IOAuth2ServiceProvider<IElance> ElanceServiceProvider { get; set; } 

它显示在IElance类型上该行的错误，但这里的接口：

public interface IElance : IApiBinding 
    { 
     /// <summary> 
     /// Search all jobs, list jobs associated with an employee or a freelancer, and retrieve information for a specific job. 
     /// </summary> 
     IJobOperations JobOperations { get; } 

     /// <summary> 
     /// Access all messages, users, messages, and Work View™ data associated with an Elance Workroom. 
     /// </summary> 
     IWorkRoomOperations WorkroomOperations { get; } 

     /// <summary> 
     /// View all of the information associated with an employee or a freelancer. 
     /// </summary> 
     IProfileOperations ProfileOperations { get; } 

     /// <summary> 
     /// View detailed information on freelancers, and retrieve a list of all freelancers employed by an employer. 
     /// </summary> 
     IFreelancerOperations FreelancerOperations { get; } 

     /// <summary> 
     /// List Elance groups, and retrieve lists of members and jobs belonging to a group. 
     /// </summary> 
     IGroupOperations GroupOperations { get; } 

     /// <summary> 
     /// Obtain ancillary Elance information, such as the current list of all job categories. 
     /// </summary> 
     IUtilityOperations UtilityOperations { get; } 
    } 

我不能为我的生活找出它为什么告诉我这一点。我错过了明显的东西吗？我非常感谢这个错误的任何方向。

Answer 1

这可能是由于IApiBinding或它的一个基本接口不是public造成的。另一种可能性是界面成员使用的类型之一不公开。