C# Await in Catch Finally Blocks

by Online Tutorials Library July 22, 2022

C# await in catch/finally blocks

C# await is a keyword. It is used to suspend execution of the method until the awaited task is complete.

In C# 6.0, Microsoft added a new feature that allows us to use await inside the catch or finally block. So, we can perform asynchronous tasks while exception is occurred.

Let’s see an example. Here, we are calling an asynchronous method inside the catch block.

C# await in Catch Block Example

 using System; using System.Threading.Tasks; using System.IO; using static System.Console; namespace CSharpFeatures {     public class ExceptionAwait     {         public static void Main(string[] args)         {                        addAsync();         }         async static Task addAsync()         {             try             {                 int[] arr = new int[5];                 arr[10] = 12;             }             catch(Exception e) {                 // Using await in catch block                 await ExceptionOccured();             }         }         async static Task ExceptionOccured()         {            Console.WriteLine(“Array Exception Occurred”);         }      } } 

Output

Array Exception Occurred

We can also use await inside the finally block. Let’s see an example.

C# await in finally block example

 using System; using System.Threading.Tasks; using System.IO; using static System.Console; namespace CSharpFeatures {     public class ExceptionAwait     {         public static void Main(string[] args)         {             addAsync();         }         async static Task addAsync()         {             try             {                 int[] arr = new int[5];                 arr[10] = 12;             }             catch (Exception e)             {                 // Using await in catch block                 await ExceptionOccured();             }             finally             {                 // Using await in finally block                 await ReleasingResources();             }         }         async static Task ExceptionOccured()         {             Console.WriteLine(“Array Exception Occurred”);         }         async static Task ReleasingResources()         {             Console.WriteLine(“Resources has been released”);         }     } } 

Output

Array Exception Occurred Resources has been released

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