class Program { static void Main(string[] args) { UserSearchRequest model = new UserSearchRequest() { Name = "'1'=0", Age = 10 }; Type type = model.GetType(); //var ps = type.GetProperties(); var ps = type.GetProperties().Where(u=>u.PropertyType.FullName =="System.String").ToList(); foreach (var p in ps) { Console.WriteLine("PropertyName:{0},Value:{1}",p.Name,p.GetValue(model,null).ToString()); p.SetValue(model, "1001",null); Console.WriteLine("PropertyName:{0},Value:{1}", p.Name, p.GetValue(model, null).ToString()); } Console.ReadLine(); } } public class UserSearchRequest { public string Name { set; get; } public int Age { set; get; } }