Invalid cast: Number » Int32

I made a c# assembly in visual studio that will take in a list of numbers and check if its even or odd. Im getting this error when i input numbers in grasshopper.

Here is my solve instance :

protected override void SolveInstance(IGH_DataAccess DA)
{
List<int> nos = new List<int>();
List<string> outp = new List<string>();
string ans=null;
DA.GetDataList(0, nos);
for (int i = 0; i < nos.Count; i++)
{
     if (nos[i] % 2 == 0)
        {
          ans = "Even";
          outp.Add(ans);
        }
     else
       {
          ans = "Odd";
          outp.Add(ans);
       }
}
DA.SetDataList(0, outp);
}