Question about passing reference type to a method

[Alex]

When I pass a reference to a method by value, the reference argument to the
method is copied but still points to the original object, and that method
can modify the object. Can I apply const keyword to the argument to prevent
this?

f.e.,

instead of:

void Method(mytype obj)
{
// can modify obj
}

do:

void Method(const mytype obj)
{
// can't modify obj
}

[Richard A. Lowe]

No, you can't. What's your use case here? Why are you
wanting to do this?

Richard

-----Original Message-----
When I pass a reference to a method by value, the reference argument to themethod is copied but still points to the original object, and that methodcan modify the object. Can I apply const keyword to the argument to preventthis?

f.e.,

instead of:

void Method(mytype obj)
{
// can modify obj
}

do:

void Method(const mytype obj)
{
// can't modify obj
}
.

[Ignacio Machin]

Hi Alex,

No, you can't this have been subject of debate before, if you don't want
your object to be change and you know for sure or donot know if the calling
method will modify it you will need to clone it before.

Take a look at this thread:
http://groups.google.com/groups?hl=e...%26scoring%3Dd

Hope this help,

--
Ignacio Machin,
ignacio.machin AT dot.state.fl.us
Florida Department Of Transportation

"Alex" <a.*******@verizon.net> wrote in message
news:O0**************@TK2MSFTNGP11.phx.gbl...

When I pass a reference to a method by value, the reference argument to the method is copied but still points to the original object, and that method
can modify the object. Can I apply const keyword to the argument to prevent this?

f.e.,

instead of:

void Method(mytype obj)
{
// can modify obj
}

do:

void Method(const mytype obj)
{
// can't modify obj
}

[Alex]

On [GMT+0100=CET],
Ignacio Machin <ignacio.machin AT dot.state.fl.us> thought hard and spewed:

Hi Alex,

No, you can't this have been subject of debate before, if you don't
want your object to be change and you know for sure or donot know if
the calling method will modify it you will need to clone it before.

Thank you, I hope that the C# designers take heed and add const parameters!