Yes, Finally will always execute.
Even if there is no catch block after try, finally block will still execute.
Basically finally can be used to release resources such as a file streams, database connections and graphics handlers without waiting for the garbage collector in the runtime to finalize the object.
try
{
int a = 10;
int b = 0;
int x = a / b;
}
catch (Exception e)
{
Console.WriteLine(e);
}
finally
{
Console.WriteLine("Finally block is executed");
}
Console.WriteLine("Some more code here");
Output:
System.DivideByZeroException: Attempted to divide by zero.
Finally block is executed
Rest of the code
Source : Exception handling in C# (With try-catch-finally block details)