Question

How to capture out of memory exception in C#?

Answer 1

Answer:

The System.OutOfMemoryException occurs when the CLR fail in allocating enough memory that is needed.

System.OutOfMemoryException is inherited from the System.SystemException class.

Set the strings −

string StudentName = "Tom";

string StudentSubject = "Maths";

Now you need to initialize with allocated Capacity that is the length of initial value −

StringBuilder sBuilder = new StringBuilder(StudentName.Length, StudentName.Length);

Now, if you will try to insert additional value, the exception occurs.

sBuilder.Insert(value: StudentSubject, index: StudentName.Length - 1, count: 1);

The following exception occurs −

System.OutOfMemoryException: Out of memory

To capture the error, try the following code −

Example

using System;

using System.Text;

namespace Demo {

  class Program {

     static void Main(string[] args) {

        try {

           string StudentName = "Tom";

           string StudentSubject = "Maths";

               

           StringBuilder sBuilder = new StringBuilder(StudentName.Length, StudentName.Length);

           // Append initial value

           sBuilder.Append(StudentName);

           sBuilder.Insert(value: StudentSubject, index: StudentName.Length - 1, count: 1);

        } catch (System.OutOfMemoryException e) {

           Console.WriteLine("Error:");

           Console.WriteLine(e);

        }

     }

  }

}

The above handles OutOfMemoryException and generates the following error −

Output

Error:

System.OutOfMemoryException: Out of memory

Explanation: