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User-defined Custom Exception in C#
C# exceptions are represented by classes. The exception classes in C# are mainly directly or indirectly derived from the System.Exception class.
You can also define your own exception. User-defined exception classes are derived from the Exception class.
The following is an example −
Example
using System;
namespace UserDefinedException {
class TestTemperature {
static void Main(string[] args) {
Temperature temp = new Temperature();
try {
temp.showTemp();
} catch(TempIsZeroException e) {
Console.WriteLine("TempIsZeroException: {0}", e.Message);
}
Console.ReadKey();
}
}
}
public class TempIsZeroException: Exception {
public TempIsZeroException(string message): base(message) {
}
}
public class Temperature {
int temperature = 0;
public void showTemp() {
if(temperature == 0) {
throw (new TempIsZeroException("Zero Temperature found"));
} else {
Console.WriteLine("Temperature: {0}", temperature);
}
}
}
Updated on: 21-Jun-2020
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