public override void FeatureActivated(SPFeatureReceiverProperties properties)
        {
            SPWeb web = null;
            if (properties.Feature.Parent is SPSite)
            {
                SPSite sites = (SPSite)properties.Feature.Parent;
                web = sites.RootWeb;
            }
            else
            {
                web = (SPWeb)properties.Feature.Parent;
            }
            if (web == null)
                return;

/* 创建网站栏  */

string columnGroup = "Financial Columns";

// Amount
            string amountFieldName = web.Fields.Add("Amount", SPFieldType.Currency, false);
            SPFieldCurrency amountField = (SPFieldCurrency)web.Fields.GetFieldByInternalName(amountFieldName);
            amountField.Group = columnGroup;
            amountField.DisplayFormat = SPNumberFormatTypes.TwoDecimals;
            amountField.MinimumValue = 0;
            amountField.Update();

// Client Name
            string clientFieldName = web.Fields.Add("Client Name", SPFieldType.Text, false);
            SPFieldText clientField = (SPFieldText)web.Fields.GetFieldByInternalName(clientFieldName);
            clientField.Group = columnGroup;
            clientField.Update();

// Date Opened
            string dateOpenedFieldName = web.Fields.Add("Date Opened", SPFieldType.DateTime, false);
            SPFieldDateTime dateOpenedField = (SPFieldDateTime)web.Fields.GetFieldByInternalName(dateOpenedFieldName);
            dateOpenedField.Group = columnGroup;
            dateOpenedField.DisplayFormat = SPDateTimeFieldFormatType.DateOnly;
            dateOpenedField.DefaultValue = "[today]";
            dateOpenedField.Update();

// Cost Center Name
            string costCenterFieldName = web.Fields.Add("Cost Center", SPFieldType.Choice, false);
            SPFieldChoice costCenterField = (SPFieldChoice)web.Fields.GetFieldByInternalName(costCenterFieldName);
            costCenterField.Choices.Add("Administration");
            costCenterField.Choices.Add("Information Services");
            costCenterField.Choices.Add("Facilities");
            costCenterField.Choices.Add("Operations");
            costCenterField.Choices.Add("Sales");
            costCenterField.Choices.Add("Marketing");
            costCenterField.Group = columnGroup;
            costCenterField.Update();

/* 创建网站内容类型 */

string contentTypeGroup = "Financial Content Types";

// 获取文档内容类型，作为财务文档的父内容类型.
            SPContentType documentCType = web.AvailableContentTypes[SPBuiltInContentTypeId.Document];

// 创建财务文档内容类型.
            SPContentType financialDocumentCType = new SPContentType(documentCType, web.ContentTypes, "Financial Document");

// 注意: 内容类型在添加前不会被初始化.
            financialDocumentCType = web.ContentTypes.Add(financialDocumentCType);
            financialDocumentCType.Group = contentTypeGroup;

// 添加 Date Opened 栏. 子代将继承该栏.
            SPFieldLink dateOpenedFieldRef = new SPFieldLink(dateOpenedField);
            dateOpenedFieldRef.Required = true;
            financialDocumentCType.FieldLinks.Add(dateOpenedFieldRef);

// 添加 Amount  栏. 子代将继承该栏.
            SPFieldLink amountFieldRef = new SPFieldLink(amountField);
            financialDocumentCType.FieldLinks.Add(amountFieldRef);

// 提交变更.
            financialDocumentCType.Update();

// 创建发票内容类型.
            SPContentType invoiceCType = new SPContentType(financialDocumentCType, web.ContentTypes, "Invoice");
            invoiceCType = web.ContentTypes.Add(invoiceCType);
            invoiceCType.Group = contentTypeGroup;

// 修改从父内容类型继承而来的Title栏.
            SPFieldLink serviceFieldRef = invoiceCType.FieldLinks[SPBuiltInFieldId.Title];
            serviceFieldRef.DisplayName = "Service";
            serviceFieldRef.Required = true;

// 添加 Client 栏.
            SPFieldLink clientFieldRef = new SPFieldLink(clientField);
            clientFieldRef.Required = true;
            invoiceCType.FieldLinks.Add(clientFieldRef);

// 指定一个文档模板.
            invoiceCType.DocumentTemplate = "Invoice.docx";

// 提交变更.
            invoiceCType.Update();

// 创建一个采购订单内容类型.
            SPContentType purchaseOrderCType = new SPContentType(financialDocumentCType, web.ContentTypes, "Purchase Order");
            purchaseOrderCType = web.ContentTypes.Add(purchaseOrderCType);
            purchaseOrderCType.Group = contentTypeGroup;

// 修改从父内容类型继承而来的Title栏.
            SPFieldLink itemFieldRef = purchaseOrderCType.FieldLinks[SPBuiltInFieldId.Title];
            itemFieldRef.DisplayName = "Item";
            itemFieldRef.Required = true;

// 添加 Department 栏.
            SPFieldLink departmentFieldRef = new SPFieldLink(costCenterField);
            departmentFieldRef.DisplayName = "Department";
            departmentFieldRef.Required = true;
            purchaseOrderCType.FieldLinks.Add(departmentFieldRef);

// 指定一个文档模板.
            purchaseOrderCType.DocumentTemplate = "PurchaseOrder.docx";

// 提交变更.
            purchaseOrderCType.Update();

}

using System;
using System.Collections.Generic;
using Microsoft.SharePoint;

namespace Test
{
    class ConsoleCTDel
    {
        static void Main(string[] args)
        {
            using (SPSite siteCollection = new SPSite("http://sp2010u/sites/contoso"))
            {
                using (SPWeb webSite = siteCollection.OpenWeb())
                {
                    //  获取准备删除的内容类型.
                    SPContentType obsolete = webSite.ContentTypes["客户"];

if (obsolete != null) // 得到.
                    {
                        IList<SPContentTypeUsage> usages = SPContentTypeUsage.GetUsages(obsolete);
                        if (usages.Count > 0) // 被使用.
                        {
                            Console.WriteLine("The content type is in use in the following locations:");
                            foreach (SPContentTypeUsage usage in usages)
                                Console.WriteLine(usage.Url);
                        }
                        else // 未被使用.
                        {
                            // 删除.
                            Console.WriteLine("Deleting content type {0}...", obsolete.Name);
                            webSite.ContentTypes.Delete(obsolete.Id);
                        }
                    }
                    else // 未找到.
                    {
                        Console.WriteLine("The content type does not exist in this site collection.");
                    }
                }
            }
            Console.Write("\nPress ENTER to continue...");
            Console.ReadLine();
        }

}
}

using System;
using Microsoft.SharePoint;

namespace Test
{
    class Program
    {
        static void Main(string[] args)
        {
            using (SPSite siteCollection = new SPSite("http://sp2010u/sites/contoso"))
            {
                using (SPWeb site = siteCollection.OpenWeb())
                {
                    // 获取一个内容类型
                    SPContentType ct = site.AvailableContentTypes["Financial Document"];

if (ct != null) // 得到一个内容类型
                    {
                        try // 获取一个列表
                        {
                            SPList list = site.Lists["共享文档"]; // 如果没找到就抛出异常

// 确认列表允许内容类型
                            list.ContentTypesEnabled = true;

// 将内容类型添加到列表
                            if (!list.IsContentTypeAllowed(ct))
                                Console.WriteLine("The {0} content type is not allowed on the {1} list",ct.Name, list.Title);// 不符合原则
                            else if (list.ContentTypes[ct.Name] != null)
                                Console.WriteLine("The content type name {0} is already in use on the {1} list",ct.Name, list.Title);// 已存在
                            else
                                list.ContentTypes.Add(ct);
                        }
                        catch (ArgumentException ex) // 未找到列表
                        {
                            Console.WriteLine("The list does not exist.");
                        }
                    }
                    else // 未找到内容类型
                    {
                        Console.WriteLine("he content type is not available in this site.");
                    }
                }
            }
            Console.Write("\nPress ENTER to continue...");
            Console.ReadLine();
        }
    }
}