How to catch out of memory exception in C#?

System.OutOfMemoryException occurs when the CLR cannot allocate enough memory required.

System.OutOfMemoryException inherits from the System.SystemException class.

Setting up the string -

string StudentName = "Tom";
string StudentSubject = "Maths";

Now you need to initialize with the allocated capacity i.e. the length of the initial value -

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

Now if you try to insert an additional value then An exception will occur.

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

The following exception occurred -

System.OutOfMemoryException: Out of memory

To catch 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);
         }
      }
   }
}

Above Handles the OutOfMemoryException and generates the following error -

Output

Error:
System.OutOfMemoryException: Out of memory

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