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How to create user defined exceptions in C#?
Like any other programming language, in C#, you can easily create user-defined exception. User-defined exception classes are derived from the Exception class.
In the below example, the exception created is not a built-in exception.
TempIsZeroException
You can try to run the following code to learn how to create user defined exception in C#.
Example
using System;
namespace Demo {
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);
}
}
}Output
TempIsZeroException: Zero Temperature found
Updated on: 23-Jun-2020
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