Question

i have a statement

int A = 10,B=6,C=5; 

and i want to write a print function such that i pass the int variable to it and it prints me the variable name and the value.

eg if i call print(A) it must return ‘A: 10’, and print (B) then it must return ‘B:6’

in short i want to know how can i access the name of the variable and print it to string in c#. DO i have to use reflection?

After reading the answers

Hi all, thanks for the suggestions provided. I shall try them out, however i wanted to know if it is at all possible in .NET 2.0? Nothing similar to

#define prt(x) std::cout << #x ' = '' << x << ''' << std::endl; 

macro which is there in C/C++?

Answer 1

The only sensible way to do this would be to use the Expression API; but that changes the code yet further…

static void Main() {     int A = 10, B = 6, C = 5;     Print(() => A); } static void Print<T>(Expression<Func<T>> expression) {     Console.WriteLine('{0}={1}',         ((MemberExpression)expression.Body).Member.Name,         expression.Compile()()); } 

Note: if this is for debugging purposes, be sure to add [Conditional('DEBUG')] to the method, as using a variable in this way changes the nature of the code in subtle ways.