C# – Try with Multiple Catch Blocks

Try with Multiple Catch Blocks: One try block can have multiple catch blocks to handle different types of exceptions occur in different lines of code.

Program to read 2 numbers and perform division: In this program, we need to handle two exceptions

• FormatException: If the input is invalid
• DivideByZeroException: If the denominator is zero

using System;				
public class Program
{
	public static void Main(string[] args)
	{
		try 
		{
			Console.WriteLine("Enter 2 integers to add : ");
			int a = Convert.ToInt32(Console.ReadLine());
			int b = Convert.ToInt32(Console.ReadLine());
			int c = a/b;
			Console.WriteLine("Result = " + c);
		}
		catch(FormatException)
		{
			Console.WriteLine("Exception : Invalid input given");
		}
		catch(DivideByZeroException)
		{
			Console.WriteLine("Exception : Denominator is zero");
		}
	}
}

We can handle Multiple exceptions in following ways:

Try with Multiple Catch blocks: It is useful to provide different message to different exceptions.

try{
       code…
}
catch(Exception1 e1){
}
catch(Exception2 e2){
}

catch object using Exception class: Same logic to handle all exceptions

try
{
       Code….
}
catch(Exception e){
}

Using OR: Related exceptions can handle with single catch block

try
{
      Code….
}
catch(Exception ex)
{
	if(ex is FormatException || ex is DivideByZeroException)
	{
		Console.WriteLine("Exception " + ex.GetType());
	}
}