FileNotFoundException in C#

If a File you are trying to find does not exist, then FileNotFoundException occurs.

Here, we are try to find a file that does not exist using StreamReader() method.

reader = new StreamReader("new.txt"))

To read it we have used the following method −

reader.ReadToEnd();

Let us see the complete code.

Example

using System.IO;
using System;
class Program {
   static void Main() {
      using (StreamReader reader = new StreamReader("new.txt")) {
         reader.ReadToEnd();
      }
   }
}

The above code will generate the following exception since the file “new.txt” does not exist.

Unhandled Exception:
System.IO.FileNotFoundException: Could not find file …