public System.Span <int> CastToInt() => MemoryMarshal.Cast <T, int>(new System.Span <T>(_array));
public System.Span <byte> CastToByte() => MemoryMarshal.Cast <T, byte>(new System.Span <T>(_array));
public System.Span <int> CastToInt() => MemoryMarshal.Cast <T, int>(new System.Span <T>(_array));
public System.Span <byte> CastToByte() => MemoryMarshal.Cast <T, byte>(new System.Span <T>(_array));