Conversion between RGB color values and integer values in C #

When I looked at a database of the previous system over the past two days, I found that there was a color field, which obviously stored the color. However, the field type is integer, And the stored value is a long string of numbers. For a moment, I ran to ask the manager how to convert the number into three values: R, G, and B? The manager said that you do not know the RGB function? Oh, remember. A friend developed with VB should know this function. Specifically, it is a macro. In msdn6, find its definition:
# Define RGB (R, G, B) (DWORD) (byte) (R) | \ (Word) (g) <8 )) | \ (DWORD) (byte) (B) <16 )))

Maybe you are not good at computer basics like me, and it is a bit dizzy to see these pile of things. Then, let's take a look at the formula with the same effect as below:
RGB = R + G * 256 + B * 256*256

C # does not have the RGB function, but I know the principle and can write it out immediately.
Method 1: Stupid, inefficient, but easy to understand.

Int RGB =   202   +   69   *   256   +   137   *   256   *   256 ;
Int B = RGB / ( 256   *   256 );
Int G = (RGB - B *   256   *   256 ) /   256 ;
Int R = (RGB - B *   256   *   256   - G *   256 );

Method 2: shift is the most efficient method. However, according to msdn, uint, ushort, and Other types do not comply with CLs, and I don't know what the problem will be.
Uint Parsergb (color)
{
Return ( Uint )((( Uint ) Color. B <   16 ) | ( Ushort )((( Ushort ) Color. g <   8 ) | Color. R ));
}

Color RGB ( Int Color)
{
Int R =   0xff   & Color;
Int G =   0xff00   & Color;
G >>=   8 ;
Int B =   0xff0000   & Color;
B >>=   16 ;
Return Color. fromargb (R, G, B );
}