c# - How to set field during runtime -

i trying set property of runtime choosen type ends missingfiledexception. have tried create instance invokemember method , activator.createinstance(type). want assign fields type type simpliest way, aren't similar eachother interface or derived class (e.g data2 , assignmentdata classes).

class program {     static void main(string[] args)     {         data ww =  getbase(typeof(data), new assignmentdata(){id= 5, text= "qq"}) data;         data2 ww2 = getbase(typeof(data2), new assignmentdata() { id = 77, text = "qrrq" }) data2;         console.readline();     }      public static object getbase(type type, assignmentdata ass)     {          list<string> membersname = new list<string>(type.getmembers().tolist().select(x => x.name));         var obj = activator.createinstance(type);         //    type.invokemember(null,          //bindingflags.declaredonly |          //bindingflags.public | bindingflags.nonpublic |          //bindingflags.instance | bindingflags.createinstance, null, null, null);         //if(membersname.any(x => x == "id"))         //{         //    type.invokemember("id",          //        bindingflags.public |          //         bindingflags.setfield, null, obj, new object[] {ass.id});         //}         if(membersname.any(x => x == "text"))         {             type.invokemember("text",                  bindingflags.declaredonly |                  bindingflags.public | bindingflags.nonpublic |                 bindingflags.instance | bindingflags.setfield, null, obj, new object[] { ass.text });         }         return obj;     }     public t getinstance<t>(type type) t : type     {         return (t)activator.createinstance(type);     } }  class basedata {     public int id { get; set; } }  class data : basedata {     public string text { get; set; } }  class data2 : basedata {     public string text { get; set; } }  class assignmentdata {     public int id { get; set; }     public string text { get; set; } } 

what looking in end result? value of assignmentdata.text end in value of data.text or data2.text?

if want set property directly instead of using invokemember.

    ....     ....     if(membersname.any(x => x == "text"))     {         propertyinfo propinfo = type.getproperty("text");         propinfo.setvalue(obj, ass.text, null);     }     ....     .... 

also, note trying set property not field. classes don't have field called text, have property called text. if want use invokemember change bindingflags.setfield bindingflags.setproperty or change text field (just public variable).