How to capture out of memory exception in C#?

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

 Live Demo

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