﻿<html><head><meta http-equiv="X-UA-Compatible" content="IE=edge" /><link rel="shortcut icon" href="../icons/favicon.ico" /><style type="text/css">.OH_CodeSnippetContainerTabLeftActive, .OH_CodeSnippetContainerTabLeft,.OH_CodeSnippetContainerTabLeftDisabled { }.OH_CodeSnippetContainerTabRightActive, .OH_CodeSnippetContainerTabRight,.OH_CodeSnippetContainerTabRightDisabled { }.OH_footer { }</style><link rel="stylesheet" type="text/css" href="../styles/branding.css" /><link rel="stylesheet" type="text/css" href="../styles/branding-en-US.css" /><script type="text/javascript" src="../scripts/branding.js"> </script><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>ILog.ErrorFormat Method </title><meta name="Language" content="en-us" /><meta name="System.Keywords" content="ErrorFormat method" /><meta name="System.Keywords" content="ILog.ErrorFormat method" /><meta name="Microsoft.Help.F1" content="log4net.ILog.ErrorFormat" /><meta name="Microsoft.Help.Id" content="Overload:log4net.ILog.ErrorFormat" /><meta name="Microsoft.Help.ContentType" content="Reference" /><meta name="BrandingAware" content="true" /><meta name="container" content="log4net" /><meta name="file" content="Overload_log4net_ILog_ErrorFormat" /><meta name="guid" content="Overload_log4net_ILog_ErrorFormat" /></head><body onload="OnLoad('cs')"><input type="hidden" id="userDataCache" class="userDataStyle" /><div class="OH_outerDiv"><div class="OH_outerContent"><table class="TitleTable"><tr><td class="OH_tdTitleColumn">ILog<span id="LST11AB4E37_0"></span><script type="text/javascript">AddLanguageSpecificTextSet("LST11AB4E37_0?cpp=::|nu=.");</script>ErrorFormat 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">Log a formatted message string with the <a href="F_log4net_Core_Level_Error.htm">Error</a> level.</div><div class="OH_CollapsibleAreaRegion"><div class="OH_regiontitle">Overload List</div><div class="OH_CollapsibleArea_HrDiv"><hr class="OH_CollapsibleArea_Hr" /></div></div><div class="OH_clear"> </div><table id="memberList" class="members"><tr><th class="ps_iconColumn">
								 
							</th><th>Name</th><th>Description</th></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubmethod.gif" alt="Public method" title="Public method" /></td><td><a href="M_log4net_ILog_ErrorFormat_1.htm">ErrorFormat(String, Object)</a></td><td><div class="summary">
            Logs a formatted message string with the <a href="F_log4net_Core_Level_Error.htm">Error</a> level.
            </div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubmethod.gif" alt="Public method" title="Public method" /></td><td><a href="M_log4net_ILog_ErrorFormat_4.htm">ErrorFormat(String, <span id="LST11AB4E37_1"></span><script type="text/javascript">AddLanguageSpecificTextSet("LST11AB4E37_1?cpp=array&lt;");</script>Object<span id="LST11AB4E37_2"></span><script type="text/javascript">AddLanguageSpecificTextSet("LST11AB4E37_2?cpp=&gt;|cs=[]|vb=()|nu=[]|fs=[]");</script>)</a></td><td><div class="summary">
            Logs a formatted message string with the <a href="F_log4net_Core_Level_Error.htm">Error</a> level.
            </div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubmethod.gif" alt="Public method" title="Public method" /></td><td><a href="M_log4net_ILog_ErrorFormat.htm">ErrorFormat(IFormatProvider, String, <span id="LST11AB4E37_3"></span><script type="text/javascript">AddLanguageSpecificTextSet("LST11AB4E37_3?cpp=array&lt;");</script>Object<span id="LST11AB4E37_4"></span><script type="text/javascript">AddLanguageSpecificTextSet("LST11AB4E37_4?cpp=&gt;|cs=[]|vb=()|nu=[]|fs=[]");</script>)</a></td><td><div class="summary">
            Logs a formatted message string with the <a href="F_log4net_Core_Level_Error.htm">Error</a> level.
            </div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubmethod.gif" alt="Public method" title="Public method" /></td><td><a href="M_log4net_ILog_ErrorFormat_2.htm">ErrorFormat(String, Object, Object)</a></td><td><div class="summary">
            Logs a formatted message string with the <a href="F_log4net_Core_Level_Error.htm">Error</a> level.
            </div></td></tr><tr data="public;declared;notNetfw;"><td><img src="../icons/pubmethod.gif" alt="Public method" title="Public method" /></td><td><a href="M_log4net_ILog_ErrorFormat_3.htm">ErrorFormat(String, Object, Object, Object)</a></td><td><div class="summary">
            Logs a formatted message string with the <a href="F_log4net_Core_Level_Error.htm">Error</a> level.
            </div></td></tr></table><a href="#mainBody">Top</a><div class="OH_CollapsibleAreaRegion" id="seeAlsoSection"><div class="OH_regiontitle">See Also</div><div class="OH_CollapsibleArea_HrDiv"><hr class="OH_CollapsibleArea_Hr" /></div></div><div class="OH_clear"> </div><h4 class="subHeading">Reference</h4><div class="seeAlsoStyle"><a href="T_log4net_ILog.htm">ILog Interface</a></div><div class="seeAlsoStyle"><a href="N_log4net.htm">log4net Namespace</a></div></div></div></div></div><div id="OH_footer" class="OH_footer">Apache log4net, Apache and log4net are trademarks of The Apache Software Foundation.<p><a href="http://logging.apache.org/log4net/" target="_blank">Copyright 2004-2017 The Apache Software Foundation</a></p><div class="OH_feedbacklink">Send comments on this topic to
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