System.InvalidOperationException with tasks in C#

Question

I am trying to make my code faster by using tasks (Parallel.foreach). Here is my updated code:

int intImageW, intImageH;
Bitmap bmpDest = new Bitmap(1, 1);
DateT         


        

Answer 1

All your Tasks access to the same shared Bitmap bmpDest.

Move the definition of it to Parallel.ForEach block so that every task can use its own Bitmap..

Parallel.ForEach(strarrFileList, strJPGImagePath =>
{
     Bitmap bmpDest = new Bitmap(1, 1);
     ........
});