Define contant and use it in Conditional attribute

 

#define LOG

using System;
using System.IO;
using System.Diagnostics;


class Starter {
    static void Main() {
        LogInfo(new StreamWriter(@"c:\logfile.txt"));
    }

    [Conditional("LOG")]
    private static void LogInfo(StreamWriter sr) {
        // write information to log file
    }
}

1.	Subclass System.Attribute
2.	A simple attribute example
3.	Use a named attribute parameter
4.	Creating and using a class attribute.
5.	Attribute in class inheritance
6.	Defining New Attribute Classes
7.	Use AttributeUsage
8.	Use a property as a named attribute parameter
9.	Demonstrate the Conditional attribute
10.	Demonstrate the Obsolete attribute
11.	Illustrates use of the Obsolete attribute
12.	Compiles into a library defining the RamdomSupplier attribute and the RandomMethod attribute
13.	Shows the use of assembly attributes
14.	How to create a custom attribute
15.	Illustrates use of the Conditional attribute
16.	Illustrates the GetCustomAttributes method
17.	demonstrates the flags attribute of an enumeration

Define contant and use it in Conditional attribute : Attribute « Language Basics « C# / C Sharp

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