Automatically Select Columns

@(await Html
    .SimpleGrid(Model.Take(3))
    .AddColumnsForModel()
    .RenderAsync())

This will automatically pick up columns from the Model's properties. It will respect the Display Attribute "AutoGenerateField" to suppress specific properties:
[Display(AutoGenerateField = false)]
Which is why the "Cast" column is not included in the Grid on the left.

Select Specific Columns

@(await Html
    .SimpleGrid(Model.Take(3))
    .AddColumnFor(movie => movie.Name)
    .AddColumnFor(movie => movie.Director)
    .AddColumn(col => col.For(movie => movie.Genre))
    .AddColumn(col => col.For(movie => movie.Released))
    .RenderAsync())

Note that AddColumnFor is a shortcut for calling AddColumn followed by For inside. You will want to use AddColumn if you want to further customize the Column as you will see in other Samples.

Remove Columns

@(await Html
    .SimpleGrid(Model.Take(3))
    .AddColumnsForModel()
    .RemoveColumn(1) // by zero based index
    .RemoveColumn("Released") // by column header
    .RenderAsync())