How do you swap two value in visual basic using third variable?

Answer 1

In any language, you swap variables x and y using the following algorithm (assuming x, y and temp are all of the same type):

temp = x

x = y

y = temp

However, this is highly inefficient for anything other than primitive data types. For complex objects, a swap is best performed using move semantics rather than copy semantics. A move merely transfers ownership of resources rather than copying them, leaving the original owner of the resources in an unspecified but otherwise valid state.

temp = move (x)

x = move (y)

y = move (temp)

Note that objects that do not support move semantics will simply default to copy semantics.