String.IsNullOrEmpty("") or string.IsNullOrEmpty("")

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Hi all,
I have a less interesting question today.
What is the preferred way to go, this one:

C#

String.IsNullOrEmpty("");

or this one:

C#

string.IsNullOrEmpty("");

I have seen both ways in different code amples (also in MSDN they seem to vary).

So what is the preferred way to go?

And please be so kind and explain why you choose on e method over the other one.

Thanks a lot and have a great day
Andy

PS, I know that keywords/aliases are synonyms for their types :)

Posted 16-Jul-12 3:19am

hoernchenmeister

Updated 16-Jul-12 3:21am

v3

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hoernchenmeister 17-Jul-12 3:11am

Thanks to all who contributed to my question.
Have a great day
Andy

Prasad_Kulkarni 17-Jul-12 3:31am

You're welcome!
Glad it helps..

3 solutions

Solution 1

As you already know string is a alias for System.String so it is ok to use any of them, but I think string.IsNullOrEmpty looks strange.

I always use string when referring to an object.
Example:

C#

string firstname = "Mike";
string message = String.Format("Hello {0}!", firstname);

Posted 16-Jul-12 3:32am

Phrone

Solution 2

string is an alias for System.String like int is alias for System.Int32 so it really doesn't matter.

What do you use if you use int extensions?

C#

var test = "123";
var myInt1 = Int32.Parse(test);
var myInt2 = int.Parse(test);

same thing..

Posted 16-Jul-12 3:32am

StianSandberg

Updated 16-Jul-12 3:36am

v3

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Prasad_Kulkarni · Accepted Answer · 2012-07-16T03:51:00

String and string mean exactly the same thing in C#.

As you stated in your question string, is an alias for String for System.String.

It seems that the convention is to use string when you are referring to an object and String when you are referring specifically to the string class.

You can use them interchangeably in your code.

C#

String x = string.Copy ("x");
string y = String.Copy ("y");

Use "String" to refer specifically to the String class.
Use "string" when referring to an object of the String class.
Referred from here[^]

Look at good article on CP:
More detailed explanation about String.IsNullOrEmpty[^]