List<string> list = new List<string>();
list.Add("a");
list.Add("b");
list.Add("c");
try
{
var test = list.Where(p => p == "ab").First();
if (test == null)
{
Console.WriteLine("ab is null");
}
}
catch (Exception ex)
{
Console.WriteLine("Enter ab and catch an exception " + ex.Message);
}
try
{
var test = list.Where(p => p == "abc").FirstOrDefault();
if (test == null)
{
Console.WriteLine("abc is null");
}
}
catch (Exception ex)
{
Console.WriteLine("Enter abc and catch an exception " + ex.Message);
}
运行截图