Passing list of objects to a singular method

Question

As you might know List<String> isn't match List<Object>.

How can I pass objects like:

List<String>
List<Int>
List<className>

to a single method?

For example imagine we have a method like:

public void _AddListOfObject(string TitleOfDaataGridView, List<Object> Values)
{
    _Temp.Columns[0].Name = TitleOfDaataGridView;               
    foreach (object  i in Values)
    {
        //...
    }
}            

Now I'm not able to pass List<string> object to this method.

How can I do that?

Answer 1

Are you looking for generic? Let's use List<T> where T is a generic type:

// Method has T generic type
public void _AddListOfObject<T>(string TitleOfDaataGridView, List<T> Values)
{
    _Temp.Columns[0].Name = TitleOfDaataGridView;  
             
    // Note, that i is of generic type T now
    foreach (T i in Values)
    {
    ...
    }
}  

from now on _AddListOfObject accepts list of any type:

List<int> list1 = new List<int>() { 1, 2, 3 };
List<string> list2 = new List<string>() { "a", "b", "c" };

_AddListOfObject("TitleInt", list1);
_AddListOfObject("TitleString", list2);