無法訪問LINQ屬性與C＃

我試圖將VB代碼（下）轉換爲C＃。 c＃代碼底部不喜歡this.UserLogin或this.CompanyID，this.CompanyType或this.CreatedDateTime。它給出了錯誤CT_CompanyLogin不包含UserLogin的定義，也沒有擴展方法UserLogin接受類型CT_CompanyLogin的第一個參數可以找到（你是否缺少使用指令或程序集引用？）無法訪問LINQ屬性與C＃

任何幫助？

Partial Class CT_CompanyLogin 

    Public Function GetCompanyAssoicatedByUserID() As Boolean 
     Dim db As DataClassesDataContext = New DataClassesDataContext() 

     Try 

     Dim mycompany = (From c In db.CT_CompanyLogIns _ 
         Where c.UserLogIn = Me.UserLogIn _ 
         Select c).Single 

      Me.CompanyID = mycompany.CompanyID 
      Me.CompanyType = mycompany.CompanyType 
      Me.CreatedDateTime = mycompany.CreatedDateTime 
      Return True 

     Catch ex As Exception 
      Return False 

     End Try 

    End Function 

End Class

C＃

partial class CT_CompanyLogin 
{ 
    public Boolean GetCompanyAssociatedByUserID() 
    { 
     DataClassesDataContext db = new DataClassesDataContext(); 

     try 
     { 
      var mycompany = (from c in db.CT_CompanyLogIns 
         where c.UserLogIn == this.UserLogin 
         select c).Single(); 

      this.CompanyID = mycompany.CompanyID; 
      this.CompanyType = mycompany.CompanyType; 
      this.CreatedDateTime = mycompany.CreatedDateTime; 

      return true; 
     } 
     catch (Exception ex) 
     { 
      return false; 
     } 

    } 
}

來源

2012-02-10 user1202606