XPRBexprUnaryNegation Operator

public static XPRBexpr operator -(
	XPRBexpr rhs
)

Public Shared Operator - ( 
	rhs As XPRBexpr
) As XPRBexpr

XPRBvar var = new XPRBvar("Variable1");
XPRBvar var2 = new XPRBvar("Variable2");
XPRBexpr exp = new XPRBexpr(var + 3.6*var2);
XPRBexpr expneg;
...
expneg = -exp;