Getting unable to find specified file error

Question

Hi Team,

I am writing below code to share the data across the multiple instances of the same application

.Writing

Reading

Getting below exception in line using (MemoryMappedFile mmf = MemoryMappedFile.OpenExisting("Demo",MemoryMappedFileRights.FullControl)).

PLease help me to read the data here.

Best Regards,

Sunil

Answer 1

Try to keep the Memory-Mapped File open. For example, if the first program is a console, then add a ReadLine, or use a breakpoint:

using( MemoryMappedFile memoryMappedFile = MemoryMappedFile.CreateFromFile. . . )
{
    . . .
    Console.ReadLine();
}

When it stops at ReadLine, check the second program.

In the real programs, you should probably wait until the second program is terminated.

Answer 2

I just converted the VB sample I had posted at https://learn.microsoft.com/en-us/answers/questions/594919/how-do-i-share-specific-pieces-of-information-betw?page=2 into WinUI 3 / C#

and it works on my OS (Windows 10 22H2) :