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& Operator (Visual Basic)
Generates a string concatenation of two expressions.
If the data type of expression1 or expression2 is not String but widens to String, it is converted to String. If either of the data types does not widen to String, the compiler generates an error.
The data type of result is String. If one or both expressions evaluate to Nothing or have a value of , they are treated as a string with a value of "".
The & operator can be overloaded, which means that a class or structure can redefine its behavior when an operand has the type of that class or structure. If your code uses this operator on such a class or structure, be sure you understand its redefined behavior. For more information, see.