For predefined value types, the equality operator (==) returns true if the values of its operands are equal, false otherwise. For reference types other than string, == returns true if its two operands refer to the same object. For the string type, == compares the values of the strings.

'Declaration
 
Public Operator =( _
   ByVal unit1 As Length, _
   ByVal unit2 As Length _
) As System.Boolean

public System.bool operator ==( 
   Length unit1,
   Length unit2
)