The inequality operator (!=) returns false if its operands are equal, true otherwise. Inequality operators are predefined for all types, including string and object. User-defined types can overload the != operator.

'Declaration
 
Public Operator <>( _
   ByVal unit1 As Length, _
   ByVal unit2 As Length _
) As Boolean

public bool operator !=( 
   Length unit1,
   Length unit2
)