MemoryFailPoint always throws an InsufficientMemoryException even when memory is available

Question

I have written the following code to check for sufficient memory,

while (true)
{
    try
    {
        // Check for available memory.
        memFailPoint = new          


        

Answer 1

MemoryFailPoint checks for consecutive available memory as documented here : http://msdn.microsoft.com/fr-fr/library/system.runtime.memoryfailpoint.aspx

You may consume very little memory, but have fragmented it a lot and then be now unable to allocate a consecutive block of memory of the needed size. It's very typical of this problem to occur after a few hours. To avoid that, use a pool of object for object you keep instantiating, it will make the memory space in use more rigid.