зеркало из https://github.com/mono/old-code.git
24 строки
1.4 KiB
XML
24 строки
1.4 KiB
XML
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<?xml version="1.0"?>
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<clause number="17.5.7" title="External methods">
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<paragraph>When a method declaration includes an extern modifier, the method is said to be an external method. External methods are implemented externally, typically using a language other than C#. Because an external method declaration provides no actual implementation, the <non_terminal where="17.5">method-body</non_terminal> of an external method simply consists of a semicolon. </paragraph>
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<paragraph>The mechanism by which linkage to an external method is achieved, is implementation-defined. </paragraph>
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<paragraph>
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<example>[Example: The following example demonstrates the use of the extern modifier in combination with a DllImport attribute that specifies the name of the external library in which the method is implemented: <code_example><![CDATA[
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using System.Text;
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using System.Security.Permissions;
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using System.Runtime.InteropServices;
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class Path
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{
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[DllImport("kernel32", SetLastError=true)]
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static extern bool CreateDirectory(string name, SecurityAttribute sa);
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[DllImport("kernel32", SetLastError=true)]
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static extern bool RemoveDirectory(string name);
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[DllImport("kernel32", SetLastError=true)]
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static extern int GetCurrentDirectory(int bufSize, StringBuilder buf);
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[DllImport("kernel32", SetLastError=true)]
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static extern bool SetCurrentDirectory(string name);
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}
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]]></code_example>end example]</example>
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</paragraph>
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</clause>
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