The ThumbsInteractionMode property of RadSlider specifies how the two thumbs of the slider, in case 
		IsSelectionRangeEnabled property is set to true, interact. The different interaction 
		modes influence the behavior of the control only in case IsSelectionRangeEnabled property is set to 
		true. 	The possible values for ThumbsInteractionMode are:
	
	
		- 
			Free - The two thumbs can accept any value in the range [MinimumValue; MaximumValue].
- 
			Lock - The first thumb can accept any value in the range [MinimumValue; SelectionEnd], whereas the second thumb can accept any value in the range [SelectionStart; MaximumValue].
- 
			Push - The first thumb pushes the second thumb, when the user tries to drag it past the second thumb and vice versa.