sizeof() operator for types

Question

I would normally do this in my C++ code:

int variable = 10;
int sizeOfVariable = sizeof(variable);   //Returns 4 for 32-bit process

But that doesn't seem to work for C#. Is there an analog?

Answer 1

The sizeof operator in C# works only on compile-time known types, not on variables (instances).

The correct example would be

int variable = 10;
int sizeOfVariable = sizeof(int);

So probably you are looking for Marshal.SizeOf which can be used on any object instances or runtime types.

int variable = 10;
int sizeOfVariable = Marshal.SizeOf(variable);    

See here for more information