ToString() and Casting

13y1.3kVisual Basic .NET

In this program ToString() method is function as casting, because it is converting one data type to other. I wish to know whether my understanding is correct.

using System;

class Program
{
static void Main()
{
int a = 4000;

string a1 = a.ToString();

Console.WriteLine(a1);

Console.ReadKey();
}
}

5 Replies

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Jignesh Trivedi13y ago
hi,

Yes your understanding is correct....
agree with vulpes use Convert.Tostring method instead of ToString method because it able to handle null value....
0
13y ago
Thank you for your explanation.
0
Vulpes13y ago
In a strict sense, within the context of C#, casting means anything which requires the use of the () casting operator or the 'as' operator.

Off the top of my head, this includes:

// conversion of basic numeric types
double d = 2.0;
int i = (int)d;

// unboxing value types
object o = 3;
int i = (int)o;

// recovering a derived class reference from a parent class variable
Derived d = new Derived();
Parent p = d
Derived d2 = (Derived)p;

// or if 'p' might be null, you can avoid an exception with:

Derived d3 = p as Derived;
0
13y ago
That means in a strict sense word "casting" is used for converting similar types (eg: from value type to value or from reference type to reference)
0
Vulpes13y ago
I would prefer the term conversion to casting as int and string are unrelated types but, in a broad sense, yes you're right.
0