IntelliJ项目构建问题

Question

我在IntelliJ中完成项目设置后收到此错误。如果我在Netbeans或Eclipse中构建我的项目，我可以编译得很好。

public class EffortDatabaseStrategy : ITestDatabase
{
    public EffortDatabaseStrategy()
    {
    }

    private DbConnection _connection;

    public IAdventureWorksDbContext CreateContext()
    {
        if (_connection == null)
        {
            _connection = Effort.DbConnectionFactory.CreateTransient();
        }
        var context = new AdventureWorksDbContext(_connection);

        return context;
    }

    public void Dispose(IAdventureWorksDbContext context)
    {
        if (context != null)
        {
            context.Dispose();
        }
    }

    public void Dispose()
    {
    }
}