using System;
    using Microsoft.Xrm.Sdk;
    using Microsoft.Xrm.Sdk.Messages;
    using Microsoft.Xrm.Sdk.Metadata;
    using Microsoft.Crm.Sdk.Messages;

    /// <summary>
    /// crm创建自定义实体
    /// </summary>
    public class CreateEntityHelper
    {
        public void Create(IOrganizationService service)
        {
            //构造Request对象
            CreateEntityRequest request = new CreateEntityRequest();
            //注释
            request.HasNotes = false;
            //是否是活动实体
            request.HasActivities = false;
            //主字段
            StringAttributeMetadata stringAttr = new StringAttributeMetadata();
            //字段名称
            stringAttr.LogicalName = "new_name";
            //架构名称
            stringAttr.SchemaName = "new_name";
            //显示中文名称
            stringAttr.DisplayName = new Label("名称", 2052);
            //字段的最大长度
            stringAttr.MaxLength = 200;
            //需求级别
            stringAttr.RequiredLevel = new AttributeRequiredLevelManagedProperty(AttributeRequiredLevel.None);

            request.PrimaryAttribute = stringAttr;

            EntityMetadata entity = new EntityMetadata();
            //表名
            entity.LogicalName = "new_autonumber_values";
            //架构名称
            entity.SchemaName = "new_autonumber_values";
            //显示名称
            entity.DisplayName = new Label("流水码", 2052);
            //复数名称
            entity.DisplayCollectionName = new Label("流水码", 2052);
            //描述
            entity.Description = new Label("流水码",2052);
            //所有权：用户实体
            entity.OwnershipType = OwnershipTypes.UserOwned;
            //审核
            entity.IsAuditEnabled = new BooleanManagedProperty(false);
            //重复检测
            entity.IsDuplicateDetectionEnabled = new BooleanManagedProperty(true);
            //连接
            entity.IsConnectionsEnabled = new BooleanManagedProperty(false);
            //发送电子邮件
            entity.IsActivityParty = false;
            //邮件合并
            entity.IsMailMergeEnabled = new BooleanManagedProperty(false);
            //文档管理
            entity.IsDocumentManagementEnabled = false;
            //队列
            entity.IsValidForQueue = new BooleanManagedProperty(false);
            //Mobile Express
            entity.IsVisibleInMobile = new BooleanManagedProperty(false);

            request.Entity = entity;

            service.Execute(request);
            System.Console.WriteLine("创建实体成功!");
            service.Execute(new PublishAllXmlRequest());
            System.Console.WriteLine("发布成功!");
           
        }
    }

结果：