true if the value of a is different from the value of b; otherwise, false.
The string.op_Inequality(string, string) method defines the operation of the inequality operator for the string class.
This operator is implemented using the string.Equals(object) method, which means the comparands are tested for a combination of reference and value equality. This operator performs an ordinal comparison.
The Visual Basic compiler does not resolve the inequality operator as a call to the string.op_Inequality(string, string) method. Instead, the inequality operator wraps a call to the Microsoft.VisualBasic.CompilerServices.Operators.CompareString(string, string, bool) method.