DataGridViewColumnDesignTimeVisibleAttribute.Visible Property        
Definition
Important
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Gets a value indicating whether the column type is visible in the DataGridView designer.
public:
 property bool Visible { bool get(); };public bool Visible { get; }member this.Visible : boolPublic ReadOnly Property Visible As BooleanProperty Value
true to indicate that the column type is visible in the DataGridView designer; otherwise, false.