如何用代码创建文档库，并创建自定义列

protected void CreateDocLib()
{
SPSite site = SPContext.Current.Site;
SPWeb web = site.OpenWeb();
 
SPListTemplateType templateType = SPListTemplateType.DocumentLibrary;
Guid listId = web.Lists.Add("MyDocLibrary", null, templateType);
SPList list = web.Lists[listId];

    // create Text type new column called "My Column"
    list.Fields.Add("My Column", SPFieldType.Text, true);
 
    // make new column visible in default view
    SPView view = list.DefaultView;
    view.ViewFields.Add("My Column");
    view.Update();
}}