</ iframe > </noscript> <!-- End Google Tag Manager (noscript) --> <div id="BeforeHeaderContent"> </div> <div id="HeaderContent"> <div id="ProjectTitle">TreeView for WinForms</div> <div id="PageTitle"><div id="PageTitleText">Add Method (C1TreeColumnCollection)</div></div> </div> <div id="AfterHeaderContent"> <!-- Spacing --> <span id="ToggleAllSectionsLink" class="FunctionLink"> <label id="CollapseAllLabel">Collapse All</label> <label id="ExpandAllLabel" style="display: none;">Expand All</label> </span><!-- Spacing --> <span id="LanguageFilterPopupLink" class="PopupLink" data-popupcontentsource="#LanguageCheckboxes" data-popuptitle='Language Filter'> <label id="ShowAllLabel" for="LanguageFilterPopupLink"> Language Filter: All </label> <label id="MultipleLabel" for="LanguageFilterPopupLink" style="display: none;"> Language Filter: Multiple </label> <label id="VBAllLabel" for="LanguageFilterPopupLink" style="display: none;"> Language Filter: Visual Basic </label> <label id="VBLabel" for="LanguageFilterPopupLink" style="display: none;">Language Filter: Visual Basic (Declaration)</label> <label id="VBUsageLabel" for="LanguageFilterPopupLink" style="display: none;">Language Filter: Visual Basic (Usage)</label> <label id="CSLabel" for="LanguageFilterPopupLink" style="display: none;">Language Filter: C#</label> <label id="CPP2005Label" for="LanguageFilterPopupLink" style="display: none;">Language Filter: C++/CLI</label> </span> <div class="PopupContent" id="LanguageCheckboxes"> <input data-languagename="VB" id="VBLanguageCheckbox" type="checkbox" class="ToggleLanguageCheckbox" checked="true" data-toggleclass="FilteredContentVB"> <label class="LanguageFilter" for="VBCheckbox"> Visual Basic (Declaration) </label> <br><input data-languagename="VBUsage" id="VBUsageLanguageCheckbox" type="checkbox" class="ToggleLanguageCheckbox" checked="true" data-toggleclass="FilteredContentVBUsage"> <label class="LanguageFilter" for="VBUsageCheckbox"> Visual Basic (Usage) </label> <br><input data-languagename="CS" id="CSLanguageCheckbox" type="checkbox" class="ToggleLanguageCheckbox" checked="true" data-toggleclass="FilteredContentCS"> <label class="LanguageFilter" for="CSCheckbox"> C# </label> <br><input data-languagename="CPP2005" id="CPP2005LanguageCheckbox" type="checkbox" class="ToggleLanguageCheckbox" checked="true" data-toggleclass="FilteredContentCPP2005"> <label class="LanguageFilter" for="CPP2005Checkbox"> C++/CLI </label> </div> </div> <div class="BreadcrumbsContainer"><table><tr><td> <a href="C1.Win.TreeView.4~C1.Win.TreeView_namespace.html">C1.Win.TreeView Namespace</a> > <a href="C1.Win.TreeView.4~C1.Win.TreeView.C1TreeColumnCollection.html">C1TreeColumnCollection Class</a> : Add Method</td></tr></table></div> <div id="BodyContent"> <div class="DescriptionContent">Adds the new column of tree to the collection.</div> <div class="SectionHeading" id="overloadlistSectionHeading"><span class="SectionHeadingIcon"><!-- --></span><span class="SectionHeadingText">Overload List</span></div><div id="overloadlistSectionContent" class="SectionContent"><table class="FilteredItemListTable"><tr><th>Overload</th><th>Description</th></tr> <tr><td class="LinkCell"><a href="C1.Win.TreeView.4~C1.Win.TreeView.C1TreeColumnCollection~Add(C1TreeColumn).html">Add(C1TreeColumn)</a></td><td class="DescriptionCell">Adds the new column of tree to the collection. </td></tr> <tr><td class="LinkCell"><a href="C1.Win.TreeView.4~C1.Win.TreeView.C1TreeColumnCollection~Add(String).html">Add(String)</a></td><td class="DescriptionCell">Adds the new column of tree with specified name to the collection. </td></tr> <tr><td class="LinkCell"><a href="C1.Win.TreeView.4~C1.Win.TreeView.C1TreeColumnCollection~Add(String,String).html">Add(String,String)</a></td><td class="DescriptionCell">Adds the new column of tree to the collection. </td></tr> </table></div> <a name="exampleBookmark"></a> <div class="SectionHeading" id="requirementsSectionHeading"><span class="SectionHeadingIcon"><!-- --></span><span class="SectionHeadingText">Requirements</span></div><div id="requirementsSectionContent" class="SectionContent"><p><b>Target Platforms:</b> Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2</p></div> <a name="seealsobookmark"></a> <div class="SectionHeading" id="seealsoSectionHeading"><span class="SectionHeadingIcon"><!-- --></span><span class="SectionHeadingText">See Also</span></div><div id="seealsoSectionContent" class="SectionContent"><h4 class="subHeading">Reference</h4><p><a href="C1.Win.TreeView.4~C1.Win.TreeView.C1TreeColumnCollection.html">C1TreeColumnCollection Class</a> <br><a href="C1.Win.TreeView.4~C1.Win.TreeView.C1TreeColumnCollection_members.html">C1TreeColumnCollection Members</a> </p> </div> </div> <div id="FooterContent"> <a href="mailto:support@company.com?subject=Documentation 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