C#•2y ago

How can I get the memory address of a feilds in C#?

created an object from a class in C#. Is it possible to retrieve its memory location and address using C# code?

i have tried this code but i got error at this line

IntPtr address = GCHandle.AddrOfPinnedObject(handle);

IntPtr address = GCHandle.AddrOfPinnedObject(handle);

IntPtr address = GCHandle.AddrOfPinnedObject(handle);

IntPtr address = GCHandle.AddrOfPinnedObject(handle); of the code

c#
Person person_1 =  new Person("mina remon shaker");
FieldInfo? fieldInfo = typeof(Person).GetField("Name");
GCHandle handle = GCHandle.Alloc(person_1, GCHandleType.Pinned);
IntPtr address = GCHandle.AddrOfPinnedObject(handle);
handle.Free();
Console.WriteLine("Object address: 0x{0:X}", address.ToInt64());

c#
Person person_1 =  new Person("mina remon shaker");
FieldInfo? fieldInfo = typeof(Person).GetField("Name");
GCHandle handle = GCHandle.Alloc(person_1, GCHandleType.Pinned);
IntPtr address = GCHandle.AddrOfPinnedObject(handle);
handle.Free();
Console.WriteLine("Object address: 0x{0:X}", address.ToInt64());

c#
Person person_1 =  new Person("mina remon shaker");
FieldInfo? fieldInfo = typeof(Person).GetField("Name");
GCHandle handle = GCHandle.Alloc(person_1, GCHandleType.Pinned);
IntPtr address = GCHandle.AddrOfPinnedObject(handle);
handle.Free();
Console.WriteLine("Object address: 0x{0:X}", address.ToInt64());

c#
Person person_1 =  new Person("mina remon shaker");
FieldInfo? fieldInfo = typeof(Person).GetField("Name");
GCHandle handle = GCHandle.Alloc(person_1, GCHandleType.Pinned);
IntPtr address = GCHandle.AddrOfPinnedObject(handle);
handle.Free();
Console.WriteLine("Object address: 0x{0:X}", address.ToInt64());

Jimmacle•5/21/24, 8:40 PM

do you have a specific goal or are you just experimenting?

Jimmacle•5/21/24, 8:44 PM

what's the actual error?

steven preadlyOP•5/21/24, 9:05 PM

no i just want to excrement

JJimmacle what's the actual error?

steven preadlyOP•5/21/24, 9:06 PM

i will send you the error

JJimmacle what's the actual error?

steven preadlyOP•5/21/24, 9:09 PM

Error    CS1501    No overload for method 'AddrOfPinnedObject' takes 1 arguments    C#ForBeginners    D:\Projects\C#ForBeginners\C#ForBeginners\Program.cs    53    Active

Error    CS1501    No overload for method 'AddrOfPinnedObject' takes 1 arguments    C#ForBeginners    D:\Projects\C#ForBeginners\C#ForBeginners\Program.cs    53    Active

Jimmacle•5/21/24, 9:10 PM

https://learn.microsoft.com/en-us/dotnet/api/system.runtime.interopservices.gchandle.addrofpinnedobject?view=net-8.0

Jimmacle•5/21/24, 9:10 PM

it's an instance method of GCHandle, not static

Jimmacle•5/21/24, 9:11 PM

also, fwiw this is certainly not "C# for beginners"

Jimmacle•5/21/24, 9:11 PM

you will probably never have to do something like this in a real program

JJimmacle <https://learn.microsoft.com/en-us/dotnet/api/system.runtime.interopservices.gch...

steven preadlyOP•5/21/24, 9:12 PM

this means that i have to create a new object GCHandle, GCHandle,

Jimmacle•5/21/24, 9:13 PM

but you have one

Jimmacle•5/21/24, 9:14 PM

GCHandle handle = GCHandle.Alloc(person_1, GCHandleType.Pinned);
IntPtr address = handle.AddrOfPinnedObject();

GCHandle handle = GCHandle.Alloc(person_1, GCHandleType.Pinned);
IntPtr address = handle.AddrOfPinnedObject();

JJimmacle also, fwiw this is certainly not "C# for beginners"

steven preadlyOP•5/21/24, 9:14 PM

i just want to experiment do you have like some other way to experiment the memory address of a feild

Jimmacle•5/21/24, 9:14 PM

no, because this is very very uncommon to do in C#

steven preadlyOP•5/21/24, 9:14 PM

aha

Jimmacle•5/21/24, 9:15 PM

the memory address of a field isn't useful information in 99.9% of cases

steven preadlyOP•5/21/24, 9:15 PM

ok got the point all what i know about this that objects and there members got stored in the heap

Jimmacle•5/21/24, 9:16 PM

yes, instances of classes are always on the heap

steven preadlyOP•5/21/24, 9:16 PM

i have another small question do i have to learn somthing about the diffreance between the heap and the stack

Jimmacle•5/21/24, 9:17 PM

it doesn't really matter for beginners

Jimmacle•5/21/24, 9:17 PM

that becomes more important to think about when you start optimizing code for high performance

steven preadlyOP•5/21/24, 9:18 PM

in the matter of fact i am going to use c# for web development ASP.NET , Core and other related to web

Pobiega•5/21/24, 9:19 PM

then you can quite safely ignore anything related to IntPtrIntPtr and GCHandleGCHandle for a long long while, and stack/heap too tbh.

steven preadlyOP•5/21/24, 9:20 PM

this are handled using browsers in that case corect

Pobiega•5/21/24, 9:20 PM

$itdepends

PPobiega $itdepends

MODiX•5/21/24, 9:20 PM

https://cdn.discordapp.com/attachments/569261465463160900/826859856719380500/1niu5wN.png

Pobiega•5/21/24, 9:20 PM

ASP.NET is primarily a server component

Jimmacle•5/21/24, 9:20 PM

in terms of web development C# code usually runs on the server only

Jimmacle•5/21/24, 9:21 PM

the only exception is blazor webassembly which is still pretty immature and not a great option for frontend

JJimmacle in terms of web development C# code usually runs on the server only

steven preadlyOP•5/21/24, 9:23 PM

OK so i don`t have to give any concentration in CG class and optimization of the code

Jimmacle•5/21/24, 9:23 PM

that's not what i said

Jimmacle•5/21/24, 9:23 PM

at some point you will probably have to care about optimization, but if you're just starting to learn then it isn't important

Pobiega•5/21/24, 9:23 PM

it should certainly not be a primary concern as a beginner

Jimmacle•5/21/24, 9:24 PM

it's more important to make it work first, then you can worry about making it fast

steven preadlyOP•5/21/24, 9:24 PM

ok thank you all @Jimmacle @Pobiega

IdiotZ42•5/24/24, 8:41 PM

Also note that the printed address in your example is tenuous, because after you free the handle the object gets unpinned, and the GC is once again free to move it around in memory however it wishes. (probably won't though, it's designed to be as lazy as possible)