static method in c#

Sharad Gupta

static method only contain static data member which is absolutely right. Then Why static method Main() contain non static data member and member function.

3 Replies

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Vulpes13y ago
It's true that this static method doesn't compile but for different reasons to the ones you've given:

public static void abc()
{
static int i=1; // not OK because can't declare static members within a method.
int j=10; // OK because it's a local variable declaration
}

I suspect there may be a confusion in your mind between fields (i.e. class level variables which are either static or instance) and local variables.

Any method, whether it's static or instance, can contain local variable declarations which only exist (at most) until the method returns.

Similarly, this won't compile either for the reasons noted:

public static void Main(String [] args)
{
int i=10; // correct, local variable declaration
static int j=10;// not correct, because can't declare static members within a method
}
Sharad Gupta13y ago
Hi Vulples

acutally i was asking to you, if any user defines it own static method.

e.g; user define static method
public static void abc()
{
static int i=1; //correct
int j=10;//incorrect because it is not static member
}
and if i wrote

public static void Main(String [] args)
{
int i=10; //correct
static int j=10;//correct
}
So i am asking to you the user defined abc static method only contain static data member,. if you are initilizing non static data member in it. it will generate a error.

and in Main() it contains both staic and non static data members why?
Vulpes13y ago
A static method isn't necessarily limited to accessing static data - it can also access instance data if it has an object reference for that data. For example:

using System;

class Test
{
static string hello = "Hello";
string goodbye = "Goodbye"; // instance data

static void Main()
{
Console.WriteLine(hello);
Test t = new Test();
Console.WriteLine(t.goodbye); // need object reference to access instance data
Console.ReadKey();
}
}