Make a linq query distict by two fields

Question

I have created my entity named Rowdetails

Public Class RowDetails
    Private m_RecordId As Int64
    Private m_DbWorldId As Int64
    Private m_TableId As Int64
    Public Property RecordId As Int64
        Get
            Return m_RecordId
        End Get
        Set(p_Value As Int64)
            m_RecordId = p_Value
        End Set
    End Property
    Public Property DbWorldId As Int64
        Get
            Return m_DbWorldId
        End Get
        Set(p_Value As Int64)
            m_DbWorldId = p_Value
        End Set
    End Property
    Public Property TableId As Int64
        Get
            Return m_TableId
        End Get
        Set(p_Value As Int64)
            m_TableId = p_Value
        End Set
    End Property
End Class

I would use linq to make a query that returns the list of entity RowDetails distinct by having the same TableId and the same RecordId. It's possible with linq? Does anybody have any suggestion?