public void Try()
{
NativeDictionary <int, int> nativeDictionary = new NativeDictionary <int, int>(50, Allocator.Temp, (i, j) => i == j);
nativeDictionary.Add(1, 3);
nativeDictionary.Add(2, 4);
int result;
nativeDictionary.Get(1, out result);
Debug.Log(result);
nativeDictionary.Get(2, out result);
Debug.Log(result);
nativeDictionary.Get(3, out result);
Debug.Log(result);
nativeDictionary.Dispose();
}