where are they?

[singa]

using Syncfusion.Windows.Forms.Grid;
using Syncfusion.Windows.Forms.Grid.Grouping;
using Syncfusion.Grouping;

Where?

[Administrator]

>> using Syncfusion.Windows.Forms.Grid;
To use this namespace, you need to reference:
Syncfusion.Shared.Base
Syncfusion.Shared.Windows
Syncfusion.Grid.Base
Syncfusion.Grid.Windows

>>using Syncfusion.Grouping;
To use this namespace, you need to reference:
Syncfusion.Shared.Base
Syncfusion.Grouping.Base

>>using Syncfusion.Windows.Forms.Grid.Grouping;
To use this namespace, you need to reference:
Syncfusion.Shared.Base
Syncfusion.Shared.Windows
Syncfusion.Grid.Base
Syncfusion.Grid.Windows
Syncfusion.Grouping.Base
Syncfusion.Grouping.Windows
Syncfusion.GridGrouping.Base
Syncfusion.GridGrouping.Windows