C # details of interaction with C ++/CLI

C #

Out

Modification, corresponding to the C ++/CLI

[Outattribute] T %

Initial code

(C ++/CLI ):

Void XXX (intptr % handle );

(C #):

Intptr handle;

XXX (Out handle );

At the beginning, C # Always prompts when calling C ++/CLI functions because there is no [outattribute ].

Error cs1502: the overload method that best matches "XXX (ref intptr)" has some invalid parameters.

Error cs1620: parameter 2 must be passed with the keyword "Ref"

Therefore, modify the C # code

Intptr handle;

XXX (ref handle );

Prompt again

Error cs0165: the unspecified local variable "handle" is used"

Sui

Intptr handle = intptr. zero;

XXX (ref handle );

Finally, the compilation is passed, but this initialization operation is always disgusting. Finally, it is changed to (C ++/CLI ):

Void XXX ([outattribute] intptr % handle );

(C #):

Intptr handle;

XXX (Out handle );