SELECT
    *,
    [Table2].[Name] AS [Country]

FROM  [dbo].[Table1]
INNER JOIN [dbo].[Table2]
ON [Table1].[CountryId] = [Table2].[Id]

db.Table1.Join(db.Table2, s => s.CountryId, c => Id, (s, c) => new {s, Country = c.Name });