Using defines and ifs

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You can use XML processing instructions to define and undefine flags and to include sections of the configuration based on the flags. For example:


<configuration>

    <?define DEBUG?>

    <components>
    
    <?if DEBUG?>
        <component 
            id="my.component" 
            service="Namespace.IService, AssemblyName"
            type="DebugVersion, AssemblyName" />
    <?elsif STAGE?>
        <component 
            id="my.component" 
            service="Namespace.IService, AssemblyName"
            type="DebugVersion, AssemblyName" />
    <?elsif PRODUCTION?>
        <component 
            id="my.component" 
            service="Namespace.IService, AssemblyName"
            type="DebugVersion, AssemblyName" />
    <?else?>
        <component 
            id="my.component" 
            service="Namespace.IService, AssemblyName"
            type="DebugVersion, AssemblyName" />
    <?end?>

    </components>
    
    <?undef DEBUG?>
    
</configuration>

There is no restriction on where the Xml PI can appear, but keep in mind that ifs cannot be nested.

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Using defines and ifs