Code

public class LaneGrid : ISwimlaneGrid
{
	public LaneGrid(Grid grid)
	{
		this.grid = grid;
	}

	public void SetRowCount(int value)
	{
		if (value >= grid.RowCount)
			grid.RowCount = value;
	}

	public void SetColumnCount(int value)
	{
		if (value >= grid.ColumnCount)
			grid.ColumnCount = value;
	}

	public int GetRowCount()
	{
		return grid.RowCount;
	}

	public int GetColumnCount()
	{
		return grid.ColumnCount;
	}

	public void SetRowHeight(int index, float value)
	{
		grid.RowHeaders[index].Height = value;
	}

	public void SetColumnWidth(int index, float value)
	{
		grid.ColumnHeaders[index].Width = value;
	}

	public float GetRowHeight(int index)
	{
		return grid.RowHeaders[index].Height;
	}

	public float GetColumnWidth(int index)
	{
		return grid.ColumnHeaders[index].Width;
	}

	public void SetLeftMargin(float value)
	{
		grid.LeftMargin = value - grid.GetRowHeaderBounds().Width;
	}

	public void SetTopMargin(float value)
	{
		grid.TopMargin = value - grid.GetColumnHeaderBounds().Height;
	}


	private Grid grid;
} 

Code

layout.SwimlaneGrid = new LaneGrid(diagram.LaneGrid);