Obsolete Attribute

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System.Obsolete is an attribute that is used to mark a type or a member that has a better version, and thus should not be used.

[Obsolete("This class is obsolete. Use SomeOtherClass instead.")]
class SomeClass
{
    //
}

In case the class above is used, the compiler will give the warning “This class is obsolete. Use SomeOtherClass instead.”

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