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copied!<blockquote> <p>Is the fact that that's there defeating the purpose of removing it from <code><compilation></code></p> </blockquote> <p>From <a href="http://msdn.microsoft.com/en-us/library/6s2x2bzy.aspx" rel="nofollow">MSDN C# Compiler Options</a><br> To open the <strong>debug</strong> the flag on the compiler is the <code>/debug</code> not the <code>/define:Debug=True</code></p> <blockquote> <p>/debug : <strong>Instruct the compiler to emit debugging information.</strong><br> /define : <strong>Defines preprocessor symbols.</strong></p> </blockquote> <p>So when you define the <code>Debug=True</code> you only make true this case of code:</p> <pre><code>#if DEBUG == true // Compile what is inside here ! #endif </code></pre> <p>the <code>/define:Debug=True</code> is not add any additional debug informations, unless you have include them manual with the above code.</p> <h2>Test page</h2> <p>I use the following code to make tests and see whats happens.</p> <pre><code> txtDebug.Text = HttpContext.Current.IsDebuggingEnabled.ToString(); #if DEBUG txtDebug.Text += "<br>defined Debug is on"; #endif #if DEBUG == true txtDebug.Text += "<br>defined Debug = true is on"; #endif </code></pre> <h2>Result 1</h2> <p>Now if the <code>debug="false"</code> and with <code>compilerOptions="/define:Debug=True"</code> the results are</p> <blockquote> <p>false<br> defined Debug = true is on</p> </blockquote> <h2>Result 2</h2> <p>if the <code>debug="true"</code> and <code>compilerOptions="/define:Debug=True"</code> the resuls are</p> <blockquote> <p>true<br> defined Debug is on<br> defined Debug = true is on</p> </blockquote> <h2>Result 3</h2> <p>Now I make one more test, I add this line on web.config</p> <pre><code> <compiler language="c#;cs;csharp" extension=".cs" compilerOptions="/define:Debug=True /D:DEBUG,TESTFLAG" type="Microsoft.CSharp.CSharpCodeProvider, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" warningLevel="4" /> </code></pre> <p>And the results are with <code>debug=false</code></p> <blockquote> <p>False (debug is false)<br> defined Debug is on (but the defined DEBUG now is runs)<br> defined Debug = true is on (This is also runs)<br> test flag (but the defined extra flag is also runs) </p> </blockquote> <h2>MSDN</h2> <p>Looking at the <a href="http://msdn.microsoft.com/en-us/library/0feaad6z(v=vs.71).aspx" rel="nofollow">MSDN for the /define (Preprocessor Definition)</a> I look that the declaration </p> <pre><code>/define:Debug=True </code></pre> <p>is work only for this case of code</p> <pre><code>#if DEBUG == true txtDebug.Text += "<br>defined Debug = true is on"; #endif </code></pre>

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