﻿<html xmlns:MSHelp="http://msdn.microsoft.com/mshelp" xmlns:mshelp="http://msdn.microsoft.com/mshelp"><head><link rel="SHORTCUT ICON" href="./../icons/favicon.ico" /><style type="text/css">.OH_CodeSnippetContainerTabLeftActive, .OH_CodeSnippetContainerTabLeft,.OH_CodeSnippetContainerTabLeftDisabled { backgroundImageName: tabLeftBG.gif; }.OH_CodeSnippetContainerTabRightActive, .OH_CodeSnippetContainerTabRight,.OH_CodeSnippetContainerTabRightDisabled { backgroundImageName: tabRightBG.gif; }.OH_footer { backgroundImageName: footer_slice.gif; background-position: top; background-repeat: repeat-x; }</style><link rel="stylesheet" type="text/css" href="./../styles/branding.css" /><link rel="stylesheet" type="text/css" href="./../styles/branding-en-US.css" /><style type="text/css">
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		</style><script src="./../scripts/branding.js" type="text/javascript"><!----></script><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>MDC.Set Method </title><meta name="Language" content="en-us" /><meta name="System.Keywords" content="Set method" /><meta name="System.Keywords" content="MDC.Set method" /><meta name="Microsoft.Help.F1" content="log4net.MDC.Set" /><meta name="Microsoft.Help.Id" content="M:log4net.MDC.Set(System.String,System.String)" /><meta name="Description" content="Add an entry to the MDC" /><meta name="Microsoft.Help.ContentType" content="Reference" /><meta name="BrandingAware" content="'true'" /><meta name="container" content="log4net" /><meta name="file" content="M_log4net_MDC_Set" /><meta name="guid" content="M_log4net_MDC_Set" /><link type="text/css" rel="stylesheet" href="ms-help://Hx/HxRuntime/HxLink.css" /><meta name="SelfBranded" content="true" /></head><body onload="onLoad()" class="primary-mtps-offline-document"><div class="OH_outerDiv"><div class="OH_outerContent"><table class="TitleTable"><tr><td class="OH_tdTitleColumn">MDC<span id="ID0EBBABAAA"> </span><script type="text/javascript">
					addToLanSpecTextIdSet("ID0EBBABAAA?vb=.|cpp=::|cs=.|fs=.|nu=.");
				</script>Set Method </td><td class="OH_tdRunningTitleColumn">Apache log4net™ SDK Documentation</td></tr></table><div id="mainSection"><div id="mainBody"><span class="introStyle"></span><div class="summary">
            Add an entry to the MDC
            </div><p></p><b>Namespace:</b> <a href="N_log4net.htm" target="">log4net</a><br /><b>Assembly:</b> <span sdata="assembly">log4net</span> (in log4net.dll) Version: 1.2.15.0 (1.2.15.0)<div class="OH_CollapsibleAreaRegion"><div class="OH_regiontitle">Syntax</div><div class="OH_CollapsibleArea_HrDiv"><hr class="OH_CollapsibleArea_Hr" /></div></div><div class="OH_clear"></div><div id="snippetGroup_Syntax" class="code"><div id="ID0ECBDAAAAA" class="OH_CodeSnippetContainer"><div class="OH_CodeSnippetContainerTabs" id="ID0ECBDAAAAA_tabs"><div class="OH_CodeSnippetContainerTabLeftActive" id="ID0ECBDAAAAA_tabimgleft"></div><div id="ID0ECBDAAAAA_tab1" class="OH_CodeSnippetContainerTabActive" EnableCopyCode="true"><a href="#" onclick="javascript:ChangeTab('ID0ECBDAAAAA','C#','1','4');return false;">C#</a></div><div id="ID0ECBDAAAAA_tab2" class="OH_CodeSnippetContainerTab" EnableCopyCode="true"><a href="#" onclick="javascript:ChangeTab('ID0ECBDAAAAA','Visual Basic','2','4');return false;">VB</a></div><div id="ID0ECBDAAAAA_tab3" class="OH_CodeSnippetContainerTab" EnableCopyCode="true"><a href="#" onclick="javascript:ChangeTab('ID0ECBDAAAAA','Visual C++','3','4');return false;">C++</a></div><div id="ID0ECBDAAAAA_tab4" class="OH_CodeSnippetContainerTabDisabledNotFirst" EnableCopyCode="true" disabled="true"><a>F#</a></div><div class="OH_CodeSnippetContainerTabRight" id="ID0ECBDAAAAA_tabimgright"></div></div><div id="ID0ECBDAAAAA_codecollection" class="OH_CodeSnippetContainerCodeCollection"><div class="OH_CodeSnippetToolBar"><div class="OH_CodeSnippetToolBarText"><a id="ID0ECBDAAAAA_ViewColorized" href="#" onclick="javascript:ExchangeTitleContent('ID0ECBDAAAAA','4')" title="View Colorized" style="display: none">View Colorized</a><a id="ID0ECBDAAAAA_copycode" href="#" onclick="javascript:CopyToClipboard('ID0ECBDAAAAA','4')" title="Copy to Clipboard">Copy to Clipboard</a><a id="ID0ECBDAAAAA_PrintText" class="OH_PrintText" href="#" onclick="javascript:Print('ID0ECBDAAAAA','4')" title="Print">Print</a></div></div><div id="ID0ECBDAAAAA_code_Div1" class="OH_CodeSnippetContainerCode" style="display: block"><pre><span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">void</span> <span class="identifier">Set</span>(
	<span class="identifier">string</span> <span class="parameter">key</span>,
	<span class="identifier">string</span> <span class="parameter">value</span>
)</pre></div><div id="ID0ECBDAAAAA_code_Plain_Div1" class="OH_CodeSnippetContainerCode" style="display: none"><pre>public static void Set(
	string key,
	string value
)</pre></div><div id="ID0ECBDAAAAA_code_Div2" class="OH_CodeSnippetContainerCode" style="display: none"><pre><span class="keyword">Public</span> <span class="keyword">Shared</span> <span class="keyword">Sub</span> <span class="identifier">Set</span> ( 
	<span class="parameter">key</span> <span class="keyword">As</span> <span class="identifier">String</span>,
	<span class="parameter">value</span> <span class="keyword">As</span> <span class="identifier">String</span>
)</pre></div><div id="ID0ECBDAAAAA_code_Plain_Div2" class="OH_CodeSnippetContainerCode" style="display: none"><pre>Public Shared Sub Set ( 
	key As String,
	value As String
)</pre></div><div id="ID0ECBDAAAAA_code_Div3" class="OH_CodeSnippetContainerCode" style="display: none"><pre><span class="keyword">public</span>:
<span class="keyword">static</span> <span class="keyword">void</span> <span class="identifier">Set</span>(
	<span class="identifier">String</span>^ <span class="parameter">key</span>, 
	<span class="identifier">String</span>^ <span class="parameter">value</span>
)</pre></div><div id="ID0ECBDAAAAA_code_Plain_Div3" class="OH_CodeSnippetContainerCode" style="display: none"><pre>public:
static void Set(
	String^ key, 
	String^ value
)</pre></div><div id="ID0ECBDAAAAA_code_Div4" class="OH_CodeSnippetContainerCode" style="display: none"><pre /></div><div id="ID0ECBDAAAAA_code_Plain_Div4" class="OH_CodeSnippetContainerCode" style="display: none"><pre /></div></div></div><script>addSpecificTextLanguageTagSet('ID0ECBDAAAAA');</script></div><div id="parameters"><h4 class="subHeading">Parameters</h4><dl paramName="key"><dt><span class="parameter">key</span></dt><dd>Type: <img src="./../icons/online_icon.gif" class="OH_offlineIcon" alt="Online" title="Online" /><a href="http://msdn2.microsoft.com/en-us/library/s1wwdcbf" target="_blank">System<span id="ID0EBCABADAAAAA"> </span><script type="text/javascript">
					addToLanSpecTextIdSet("ID0EBCABADAAAAA?vb=.|cpp=::|cs=.|fs=.|nu=.");
				</script>String</a><br /><span>The key to store the value under.</span></dd></dl><dl paramName="value"><dt><span class="parameter">value</span></dt><dd>Type: <img src="./../icons/online_icon.gif" class="OH_offlineIcon" alt="Online" title="Online" /><a href="http://msdn2.microsoft.com/en-us/library/s1wwdcbf" target="_blank">System<span id="ID0EBCAAADAAAAA"> </span><script type="text/javascript">
					addToLanSpecTextIdSet("ID0EBCAAADAAAAA?vb=.|cpp=::|cs=.|fs=.|nu=.");
				</script>String</a><br /><span>The value to store.</span></dd></dl></div><div class="OH_CollapsibleAreaRegion"><div class="OH_regiontitle">Remarks</div><div class="OH_CollapsibleArea_HrDiv"><hr class="OH_CollapsibleArea_Hr" /></div></div><div class="OH_clear"></div><div class="alert"><table><tr><th><img class="mtps-img-src" src="./../icons/alert_note.gif" alt="Note" /> <b>Note</b></th></tr><tr><td>
            The MDC is deprecated and has been replaced by the <a href="P_log4net_ThreadContext_Properties.htm" target="">Properties</a>.
            The current MDC implementation forwards to the <span class="code">ThreadContext.Properties</span>.
            </td></tr></table></div><p>
            Puts a context value (the <span class="parameter">value</span> parameter) as identified
            with the <span class="parameter">key</span> parameter into the current thread's
            context map.
            </p><p>
            If a value is already defined for the <span class="parameter">key</span>
            specified then the value will be replaced. If the <span class="parameter">value</span> 
            is specified as <span class="code">null</span> then the key value mapping will be removed.
            </p><a name="seeAlsoSection"><!----></a><div class="OH_CollapsibleAreaRegion"><div class="OH_regiontitle">See Also</div><div class="OH_CollapsibleArea_HrDiv"><hr class="OH_CollapsibleArea_Hr" /></div></div><div class="OH_clear"></div><div class="seeAlsoStyle"><a href="T_log4net_MDC.htm" target="">MDC Class</a></div><div class="seeAlsoStyle"><a href="AllMembers_T_log4net_MDC.htm" target="">MDC Members</a></div><div class="seeAlsoStyle"><a href="N_log4net.htm" target="">log4net Namespace</a></div></div></div></div></div><div id="OH_footer" class="OH_footer"><p>Apache log4net, Apache and log4net are trademarks of The Apache Software Foundation.</p><p><a href="http://logging.apache.org/log4net/" target="_blank"><img src="./../icons/online_icon.gif" class="OH_offlineIcon" alt="Online" title="Online" /> 
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