c# - How to get the field names of a list inside foreach? -

i have following class:

public class listofvariablestosave : list<list<int>> {     public list<int> controldb { get; set; }     public list<int> interacdb { get; set; }      public listofvariablestosave()     {         controldb = new list<int> { 1, 2, 3 };         interacdb = new list<int> { 21, 22, 23 };          add(controldb);         add(interacdb);     } } 

and following code write content text file:

listofvariablestosave mylistofvariablestosave = new listofvariablestosave();  streamwriter myfile = new streamwriter("filename.txt"); foreach (list<int> db in mylistofvariablestosave) {     foreach (int vartosave in db)     {         myfile.writeline(vartosave);     } } myfile.close(); 

what is:

1 2 3 21 22 23 

what is:

controldb 1 2 3 interacdb 21 22 23 

is possible perhaps adding single line of code after first foreach?

i think doing this:

public class listofvariablestosave : list<listofthings<int>> {     public listofthings<int> controldb { get; set; }     public listofthings<int> interacdb { get; set; }      public listofvariablestosave()     {         controldb = new listofthings<int>() { 1, 2, 3  };         controldb.name = "controldb";         interacdb = new listofthings<int>() { 21, 22, 23 };         interacdb.name = "interacdb";          add(controldb);         add(interacdb);     }  }  public class listofthings<t> : list<t> {     public string name { get; set; }      public listofthings() : base() { } } 

instead of listofvariablestosave being derived list<list<int>> instead create class derives list<int> , adds name property.

you can iterate this:

var lists = new listofvariablestosave(); foreach (var list in lists)  {     console.writeline(list.name);     foreach (var in list)     {         console.writeline(i);     } }