The use and difference of ref and out.

There has been a lot of explanation about the usage and the difference between ref and out, and it's just an explanation that's easier to understand than to write about me.

Both ref and out can be used to return data in a function, similar to pointers in C + +.

Parameters	Ref	Out
Must be initialized	Is	Whether
Mechanism	The address of the passed parameter, such as declaring theint i=0; Iis an address stored in the memory heap0x000001so that's the address.0x000001	No initialization is required, that is, there is no storage space for the defined variables. is defined in the function body, so it is just the return value. (if previously defined, it is emptied in the body of the function before assigning a value)
General purpose	The call method modifies a reference to a parameter passed in (for example, the value of a string).	suitable for use in NeedRetrun where multiple return values are
Image memory	There are in and out	Just can't get in.

The use and difference of ref and out.