Is there any way to findout the datatype of any column in a datatable?

foreach (DataRow row in dataSet2.Tables[0].Rows)
{
    foreach (DataColumn col in dataSet2.Tables[0].Columns)
    {
        if(row[col].GetType() == typeof(int)){
            row[col] = 0;
        }
        if (row[col].GetType() == typeof(string))
        {
            row[col] = "no data";
        }
    }
}