SPList.Hidden property

Gets or sets a Boolean value that specifies whether the list is hidden.

Namespace:  Microsoft.SharePoint
Assembly:  Microsoft.SharePoint (in Microsoft.SharePoint.dll)

public bool Hidden { get; set; }

Property value

Type: System.Boolean
true if the list is hidden; otherwise, false. The default value is false.

A hidden list does not appear on the Documents and Lists page, Quick Launch bar, the Modify Site Content page, or the Add Column page as an option for lookup fields.