参数对象化，怎样用linq拼SQL？？？？

public class NewsTitleSearchCondition
    {
        /// <summary>
        /// 开始日期
        /// </summary>
        [DataMember]
        public DateTime StarDate { get; set; }

        /// <summary>
        /// 结束日期日期
        /// </summary>
        [DataMember]
        public DateTime EndDate { get; set; }

        /// <summary>
        /// 标题
        /// </summary>
        [DataMember]
        public string Title { get; set; }
}

//用对象拼出SQL,SQL条件为OR
 private string GetSelectCommand(NewsTitleSearchCondition condition)
{
  string sql="select * from AA"
  //SQL+condition对象。。（用linq咋写呀？？）
}

同事给一段代码，叫我参照参照，琢磨了一下，没看懂！！
代码如下：
public class k
{
public void hh(SearchCondition condition)
{

Type t= typeof( condition);
System.Reflection.PropertyInfo[] g= t.GetProperties (condition);

var query = from item in g
select new ConditionField
{
Name=item.Name ,
Value = string.Empty + item.GetValue(condition),
};
string sql = " sss where ";
foreach (ConditionField ini in query)
{
ini.Name
ini.Value
sql+= ini.Name like ini.Value
}
sql
}
}
[解决办法]
http://blog.csdn.net/q107770540/article/details/5724013