ありがとう

short[] data = new short[1000];
data[0] = -3;
data[1] = -5;

ushort out1;
ushort out2;
unsafe
{
fixed (short* p = data)
{
out1 = *(ushort*)&p[0];
out2 = *(ushort*)&p[1];
}
}