find if an integer exists in a list of integers

Question

i have this code:

  List apps = getApps();

        List ids;

        List dropdown = apps.ConvertAll(c => new          


        

Answer 1

bool vExist = false;
int vSelectValue = 1;

List vList = new List();
vList.Add(1);
vList.Add(2);

IEnumerable vRes = (from n in vListwhere n == vSelectValue);
if (vRes.Count > 0) {
    vExist = true;
}