Question

How can I get the number of free bytes available in memory, in .NET?

Also, can you think of a potentially better random number beside new Random().Next(), DateTime.Now.Ticks, or available system memory?

Answer 1

As for your question regarding memory metrics, look into using performance counters.

using System.Diagnostics;
...
PerformanceCounter counter = new PerformanceCounter("Memory", "Available Bytes");
long freeBytes = counter.RawValue;

You may end up needing to use a different counter, such as “Memory\Free & Zero Page List Bytes,” to get what you want. I recommend experimenting with the performance counters in perfmon.