Generate ntext/nvarchar column when using Entity Framework Code First and a DBMigration

I'd like to either using the Fluent API or data annotations be able to automatically generate a database migration class for a string column as an `ntext` rather than a fixed length string. How would I do that? When using Entity Framework v6, with Code First, and SQL Server Compact 4, given a simple C# class such as: ``` public class GameFile { public string Id { get; set; } public string FileData { get; set; } public int FileSize { get; set; } } ``` Then, when adding a new migration: ``` add-migration first ``` the resulting migration class defaults to a `string` column of maximum length `4000`. ``` CreateTable( "dbo.GameFiles", c => new { Id = c.String(nullable: false, maxLength: 4000), FileData = c.String(maxLength: 4000), FileSize = c.Int() }) .PrimaryKey(t => t.Id); ``` When the database is updated via `update-database`, the table will have a column named `FileData` of type `nvarchar(4000)`. I've tried adding an attribute of `MaxLength` and/or `Column` to the `FileData` property, but there's no change in the generated migration code. ``` [MaxLength, Column(TypeName = "ntext")] public string FileData { get; set; } ``` I know if I manually edit the migration code to explicitly declare the `storeType`: ``` FileData = c.String(storeType: "ntext") ``` that the resulting table is created properly.