Local variable scoping in C#

Community Convergence XXXVI

Charlie Calvert's Community Blog — Mon, 10 Dec 2007 11:11:03 GMT

Welcome to the thirty-sixth issue of Community Convergence. This is the big day, with Visual Studio 2008

Community Convergence XXXVI

Charlie Calvert's Community Blog — Mon, 10 Dec 2007 11:09:07 GMT

Welcome to the thirty-sixth issue of Community Convergence. This is the big day, with Visual Studio 2008

Community Convergence XXXVI

Charlie Calvert's Community Blog — Tue, 20 Nov 2007 02:04:11 GMT

Welcome to the thirty-sixth issue of Community Convergence. This is the big day, with Visual Studio 2008

re: Local variable scoping in C#

samng — Mon, 19 Nov 2007 21:41:50 GMT

Hi Tanveer,

You're absolutely right - a parameter can hide the name of fields, as can exception variables. Though both of these are not declared via a local variable declaration, they are both considered to be local variables.

In my previous post about compiler-generated scopes for local variables, I mention the different types of local variables that the compiler allows you to create - catch variables, foreach iteration variables, anonymous method/lambda parameters, and using statements, along with the regular local variable and local method parameters.

re: Local variable scoping in C#

Tanveer Badar — Sun, 18 Nov 2007 23:00:00 GMT

There is one more case name hiding I remember, a parameter can hide the name of class scoped (instance or static, doesn't matter) variables.

Additionally, an exception variable will hide a class scoped variable if that variable is not used outside catch block. This program correctly compiles with the expected meaning:

public class Example

{

int ex;

public void example( )

{

try

{

}

catch( Exception ex )

{

string message = ex.Message;

ex = null;

};

}

re: Local variable scoping in C#

Ivan.Eryshov — Sun, 18 Nov 2007 21:25:02 GMT

Sam, your blog is a nice addition to a great number of blogs about .NET.

Go ahead!

Local variable scoping in C#

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