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How to use ‘is’ operator in C#?
The "is" operator in C# checks whether the run-time type of an object is compatible with a given type or not.
The following is the syntax −
expr is type
Here, expr is the expression and type is the name of the type
The following is an example showing the usage of is operator in C# −
Example
using System;
class One { }
class Two { }
public class Demo {
public static void Test(object obj) {
One x;
Two y;
if (obj is One) {
Console.WriteLine("Class One");
x = (One)obj;
} else if (obj is Two) {
Console.WriteLine("Class Two");
y = (Two)obj;
} else {
Console.WriteLine("None of the classes!");
}
}
public static void Main() {
One o1 = new One();
Two t1 = new Two();
Test(o1);
Test(t1);
Test("str");
Console.ReadKey();
}
}Output
Class One Class Two None of the classes!
Updated on: 20-Jun-2020
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