public static cClass ParentCopyToChild<pClass,cClass>(pClass parent) where cClass: class,pClass,new()

        {

            //ChildClass child = new ChildClass();

            cClass child = new cClass();

            var ParentType = typeof(pClass);

            var Properties = ParentType.GetProperties();

            foreach (var Propertie in Properties)

            {

                if (Propertie.CanRead && Propertie.CanWrite)

                {

                    Propertie.SetValue(child, Propertie.GetValue(parent, null), null);

                }

            }

            return child;

        }

public class TreeViewOrgEx:TreeViewOrg

    {

        public long ParentCode = 0;

        public string TypeName = string.Empty;

        //树开启多选框时，此属性决定是否默认选中

        public bool isChecked;

        //树开启多选框时，此属性决定多选框是否禁用

        public bool chkDisabled;

        //树是否默认展开

        public bool open = true;

        public int ISRole = 0;

        //需要一个默认构造函数

        public TreeViewOrgEx()

        {

        }

        public TreeViewOrgEx(TreeViewOrg orgBase)

        {

            this.ID = orgBase.ID;

            this.OrgCode = orgBase.OrgCode;

            this.OrgName = orgBase.OrgName;

            this.OrgLevel = orgBase.OrgLevel;

            this.OrgType = orgBase.OrgType;

            this.SourceCode = orgBase.SourceCode;

            this.UpdateTime = orgBase.UpdateTime;

        }

    }

TreeViewOrg tempOrg = new TreeViewOrg();

tempOrg.OrgCode = 10000000000;

TreeViewOrgEx orgEx = new TreeViewOrgEx(tempOrg);

orgEx.ParentCode = 20000000000;

public void TreeViewOrgToTreeViewOrgEx(TreeViewOrg org, TreeViewOrgEx orgEx)

        {

            orgEx.ID = org.ID;

            orgEx.OrgCode = org.OrgCode;

            orgEx.OrgName = org.OrgName;

            orgEx.OrgLevel = org.OrgLevel;

            orgEx.OrgType = org.OrgType;

            orgEx.SourceCode = org.SourceCode;

           orgEx.UpdateTime = org.UpdateTime;

        }