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Method Parameters (C# Reference)

Visual Studio 2010

If a parameter is declared for a method without ref or out, the parameter can have a value associated with it. That value can be changed in the method, but the changed value will not be retained when control passes back to the calling procedure. By using a method parameter keyword, you can change this behavior.

This section describes the keywords you can use when declaring method parameters:

Reference

C# Keywords

Concepts

C# Programming Guide

Other Resources

C# Reference
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Changes in parameters
The value of a parameter can be changed in the method, but the changed value will not be retained when control passes back to the calling procedure, unless the parameter is a reference type, e.g. object, string, array, etc. They do not need to be declared with ref or out, to be changed by the methods.
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