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What is reference check in c sharp?

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Anonymous

14y ago
Updated: 8/19/2019

My answer to "Null reference check":

It is very good idea to check for the null for a reference type object (argument, variable), before accessing its property or functions.

But don't abuse it - don't need to check for null on every statement.

For example:

public void MyService(Stream inputStream) {

if (inputStream == null) // the null reference check

{

// either throw an exception or simply return;

} else {

inputStream.Read(); //if inputStream is null, it will not understand Read()

}

}

The core is inputStream.Read();

but if inputStream is null by calling MyService(null);

without the null reference check, if just the core line, the program will throw a runtime exception.

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Wiki User

14y ago

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