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C# Cast method
To cast elements, use the Cast() method.
The following is our list.
List<object> myList = new List<object> { "Mac", "Windows", "Linux", "Solaris" };Now, cast and use the Cast() method with substring() method to display the first two letters of every string in the list.
IEnumerable<string> res = myList.AsQueryable().Cast<string>().Select(str => str.Substring(0, 2));
Let us see the complete example.
Example
using System;
using System.Linq;
using System.Collections.Generic;
class Demo {
static void Main() {
List<object> list = new List<object> { "keyboard", "mouse", "joystick", "monitor" };
// getting first 2 letters from every string
IEnumerable<string> res = list.AsQueryable().Cast<string>().Select(str => str.Substring(0, 2));
foreach (string str in res)
Console.WriteLine(str);
}
}Output
ke mo jo mo
Updated on: 23-Jun-2020
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