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<html xmlns:MSHelp="http://msdn.microsoft.com/mshelp" xmlns:mshelp="http://msdn.microsoft.com/mshelp" xmlns:ddue="http://ddue.schemas.microsoft.com/authoring/2003/5" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:msxsl="urn:schemas-microsoft-com:xslt"><head><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=UTF-8" /><META NAME="save" CONTENT="history" /><title>Close Method </title><link rel="stylesheet" type="text/css" href="../styles/presentation.css" /><link rel="stylesheet" type="text/css" href="ms-help://Hx/HxRuntime/HxLink.css" /><script type="text/javascript" src="../scripts/EventUtilities.js"> </script><script type="text/javascript" src="../scripts/SplitScreen.js"> </script><script type="text/javascript" src="../scripts/Dropdown.js"> </script><script type="text/javascript" src="../scripts/script_manifold.js"> </script><script type="text/javascript" src="../scripts/script_feedBack.js"> </script><script type="text/javascript" src="../scripts/CheckboxMenu.js"> </script><script type="text/javascript" src="../scripts/CommonUtilities.js"> </script><meta name="container" content="BerkeleyDB" /><meta name="file" content="M_BerkeleyDB_DatabaseEnvironment_Close" /><meta name="guid" content="M_BerkeleyDB_DatabaseEnvironment_Close" /><xml><MSHelp:Attr Name="AssetID" Value="M:BerkeleyDB.DatabaseEnvironment.Close" /><MSHelp:TOCTitle Title="Close Method " /><MSHelp:RLTitle Title="DatabaseEnvironment.Close Method (BerkeleyDB)" /><MSHelp:Keyword Index="A" Term="M:BerkeleyDB.DatabaseEnvironment.Close" /><MSHelp:Keyword Index="A" Term="frlrfBerkeleyDBDatabaseEnvironmentClassCloseTopic" /><MSHelp:Keyword Index="K" Term="Close method" /><MSHelp:Keyword Index="K" Term="DatabaseEnvironment.Close method" /><MSHelp:Keyword Index="F" Term="Close" /><MSHelp:Keyword Index="F" Term="DatabaseEnvironment.Close" /><MSHelp:Keyword Index="F" Term="BerkeleyDB.DatabaseEnvironment.Close" /><MSHelp:Attr Name="APIType" Value="Managed" /><MSHelp:Attr Name="APILocation" Value="libdb_dotnet53.dll" /><MSHelp:Attr Name="APIName" Value="BerkeleyDB.DatabaseEnvironment.Close" /><MSHelp:Attr Name="DevLang" Value="CSharp" /><MSHelp:Attr Name="DevLang" Value="VB" /><MSHelp:Attr Name="DevLang" Value="C++" /><MSHelp:Attr Name="Locale" Value="en-us" /><MSHelp:Attr Name="TopicType" Value="kbSyntax" /><MSHelp:Attr Name="TopicType" Value="apiref" /><MSHelp:Attr Name="Abstract" Value="By closing the Berkeley DB environment you can free allocated resources and close any open databases along with the underlying subsystems." /><MSHelp:Attr Name="AssemblyVersion" Value="5.3.28.0" /></xml></head><body><input type="hidden" id="userDataCache" class="userDataStyle" /><input type="hidden" id="hiddenScrollOffset" /><img id="collapseImage" style="display:none; 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By closing the Berkeley DB environment you can free allocated resources
and close any open databases along with the underlying subsystems.
</div><p />
<b>Namespace:</b>
<a href="N_BerkeleyDB.htm">BerkeleyDB</a><br />
<b>Assembly:</b>
<span sdata="assembly">libdb_dotnet53</span> (in libdb_dotnet53.dll) Version: 5.3.28.0<h1 class="heading"><span onclick="ExpandCollapse(syntaxToggle)" style="cursor:default;" onkeypress="ExpandCollapse_CheckKey(syntaxToggle, event)" tabindex="0"><img id="syntaxToggle" class="toggle" name="toggleSwitch" src="../icons/collapse_all.gif" />Syntax</span></h1><div id="syntaxSection" class="section" name="collapseableSection" style=""><div id="syntaxCodeBlocks" class="code"><span codeLanguage="CSharp"><table><tr><th>C#</th></tr><tr><td><pre xml:space="preserve"><span class="keyword">public</span> <span class="keyword">void</span> <span class="identifier">Close</span>()</pre></td></tr></table></span><span codeLanguage="VisualBasicDeclaration"><table><tr><th>Visual Basic (Declaration)</th></tr><tr><td><pre xml:space="preserve"><span class="keyword">Public</span> <span class="keyword">Sub</span> <span class="identifier">Close</span></pre></td></tr></table></span><span codeLanguage="ManagedCPlusPlus"><table><tr><th>Visual C++</th></tr><tr><td><pre xml:space="preserve"><span class="keyword">public</span>:
<span class="keyword">void</span> <span class="identifier">Close</span>()</pre></td></tr></table></span></div></div><h1 class="heading"><span onclick="ExpandCollapse(remarksToggle)" style="cursor:default;" onkeypress="ExpandCollapse_CheckKey(remarksToggle, event)" tabindex="0"><img id="remarksToggle" class="toggle" name="toggleSwitch" src="../icons/collapse_all.gif" />Remarks</span></h1><div id="remarksSection" class="section" name="collapseableSection" style="">
<p>
The object should not be closed while any other handle that refers
to it is not yet closed; for example, database environment handles
must not be closed while transactions in the environment have
not yet been committed or aborted.
When you close each database handle, by default, the database is not synchronized.
To synchronize all open databases ensure that the last environment object is closed by the CloseForceSync() method.
When the close operation fails, the method returns a non-zero error value for the first instance of such error,
and continues to close the rest of the environment objects.
</p>
<p>
Where the environment was configured with
<a href="F_BerkeleyDB_DatabaseEnvironmentConfig_UseTxns.htm">UseTxns</a>, calling CloseForceSync
aborts any unresolved transactions. Applications should not depend
on this behavior for transactions involving Berkeley DB databases;
all such transactions should be explicitly resolved. The problem
with depending on this semantic is that aborting an unresolved
transaction involving database operations requires a database
handle. Because the database handles should have been closed before
calling CloseForceSync, it will not be possible to abort the
transaction, and recovery will have to be run on the Berkeley DB
environment before further operations are done.
</p>
<p>
In multithreaded applications, only a single thread may call
CloseForceSync.
</p>
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