The minimum distance is used when the layout is set to 'MinimumSpacing'. When that layout rule is used the distance between points will not fall below this value. The measurement type determines how the distance is measured.

public double MinimumDistance { get; set; }

Public Property MinimumDistance As Double
	Get
	Set

public:
property double MinimumDistance {
	double get ();
	void set (double value);
}