SQL Query to LINQ HELP

Question

i need to convert this to linq,

someone please help me!

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SELECT 

*

FROM [sec].[Security].[Forms] AS [Extent2]

 LEFT OUTER JOIN [sec].[Security].[Rights] AS [Extent1] ON [Extent1].Form_ID = [Extent2].ID

 where [Extent2].Module_ID=12 and ( [Extent1].Group_ID=1 or [Extent1].Group_ID is null )

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here

1. SEC is the Database

2. Security is the Schema