LINQ to SQL - Many to Many Relationships

USE master
Create Database [Sample]
GO

USE [Sample]
GO

/****** Object:  Table [dbo].[Role]    Script Date: 08/07/2009 17:24:25 ******/
SET ANSI_NULLS ON
GO

SET QUOTED_IDENTIFIER ON
GO

CREATE TABLE [dbo].[Role](
	[Id] [int] IDENTITY(1,1) NOT NULL,
	[Name] [nvarchar](50) NOT NULL,
	[Description] [nvarchar](150) NULL,
	[CreatedDate] [datetime] NOT NULL,
	[ModifiedDate] [datetime] NOT NULL,
	[RowVersion] [timestamp] NOT NULL,
 CONSTRAINT [PK_Role] PRIMARY KEY CLUSTERED 
(
	[Id] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
) ON [PRIMARY]

GO

USE [Sample]
GO

/****** Object:  Table [dbo].[User]    Script Date: 08/07/2009 17:24:25 ******/
SET ANSI_NULLS ON
GO

SET QUOTED_IDENTIFIER ON
GO

SET ANSI_PADDING ON
GO

CREATE TABLE [dbo].[User](
	[Id] [int] IDENTITY(1,1) NOT NULL,
	[EmailAddress] [nvarchar](250) NOT NULL,
	[FirstName] [nvarchar](200) NULL,
	[LastName] [nvarchar](200) NULL,
	[Avatar] [varbinary](max) NULL,
	[CreatedDate] [datetime] NOT NULL,
	[ModifiedDate] [datetime] NOT NULL,
	[RowVersion] [timestamp] NOT NULL,
	[PasswordHash] [char](86) NOT NULL,
	[PasswordSalt] [char](5) NOT NULL,
	[Comment] [text] NULL,
	[IsApproved] [bit] NOT NULL,
	[LastLoginDate] [datetime] NULL,
	[LastActivityDate] [datetime] NOT NULL,
	[LastPasswordChangeDate] [datetime] NULL,
	[AvatarType] [nvarchar](150) NULL,
 CONSTRAINT [PK_User] PRIMARY KEY CLUSTERED 
(
	[Id] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]

GO

SET ANSI_PADDING OFF
GO

USE [Sample]
GO

/****** Object:  Table [dbo].[UserRole]    Script Date: 08/07/2009 17:24:25 ******/
SET ANSI_NULLS ON
GO

SET QUOTED_IDENTIFIER ON
GO

CREATE TABLE [dbo].[UserRole](
	[UserId] [int] NOT NULL,
	[RoleId] [int] NOT NULL,
 CONSTRAINT [PK_UserRole] PRIMARY KEY CLUSTERED 
(
	[UserId] ASC,
	[RoleId] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
) ON [PRIMARY]

GO

ALTER TABLE [dbo].[Role] ADD  DEFAULT (getdate()) FOR [CreatedDate]
GO

ALTER TABLE [dbo].[Role] ADD  DEFAULT (getdate()) FOR [ModifiedDate]
GO

ALTER TABLE [dbo].[User] ADD  CONSTRAINT [DF__User__CreatedDat__1920BF5C]  DEFAULT (getdate()) FOR [CreatedDate]
GO

ALTER TABLE [dbo].[User] ADD  CONSTRAINT [DF__User__ModifiedDa__1A14E395]  DEFAULT (getdate()) FOR [ModifiedDate]
GO

ALTER TABLE [dbo].[User] ADD  CONSTRAINT [DF__User__PasswordHa__3A81B327]  DEFAULT ('') FOR [PasswordHash]
GO

ALTER TABLE [dbo].[User] ADD  CONSTRAINT [DF__User__PasswordSa__3B75D760]  DEFAULT ('') FOR [PasswordSalt]
GO

ALTER TABLE [dbo].[User] ADD  CONSTRAINT [DF__User__IsApproved__3C69FB99]  DEFAULT ((1)) FOR [IsApproved]
GO

ALTER TABLE [dbo].[User] ADD  CONSTRAINT [DF__User__LastLoginD__3D5E1FD2]  DEFAULT (getdate()) FOR [LastLoginDate]
GO

ALTER TABLE [dbo].[User] ADD  CONSTRAINT [DF__User__LastActivi__3E52440B]  DEFAULT (getdate()) FOR [LastActivityDate]
GO

ALTER TABLE [dbo].[UserRole]  WITH NOCHECK ADD  CONSTRAINT [FK_UserRole_Role] FOREIGN KEY([RoleId])
REFERENCES [dbo].[Role] ([Id])
GO

ALTER TABLE [dbo].[UserRole] CHECK CONSTRAINT [FK_UserRole_Role]
GO

ALTER TABLE [dbo].[UserRole]  WITH NOCHECK ADD  CONSTRAINT [FK_UserRole_User] FOREIGN KEY([UserId])
REFERENCES [dbo].[User] ([Id])
GO

ALTER TABLE [dbo].[UserRole] CHECK CONSTRAINT [FK_UserRole_User]
GO


USE [Sample]
GO
Insert Into [User] (EmailAddress, FirstName, LastName, PasswordHash, PasswordSalt)
Values('hunter.cole@sample.com', 'Hunter', 'Cole', '1', '1')

USE [Sample]
GO
Insert Into [Role]([Name])
Values('Newb')

Insert Into [Role]([Name])
Values('Nobody')

Insert Into [Role]([Name])
Values('Admin')