Added info about external DLLs

Author: LexaGV

README.md

@@ -1,14 +1,14 @@
-# WPFColorLib
-
-This library is created for "WPF/.NET FW 4.8" and intended to work with colors.
-
--------------------------------------------------------------------------------------
-Standard WPF lacks of color selection dialog and WPFColorLib fills this niche with brand new approach:
-
-![Picture of dialog]( https://i.imgur.com/yeyOuX5_d.webp?maxwidth=760&fidelity=grand )
-
-Description of functionality:
-
+# WPFColorLib
+
+This library is created for "WPF/.NET FW 4.8" and intended to work with colors.
+
+-------------------------------------------------------------------------------------
+Standard WPF lacks of color selection dialog and WPFColorLib fills this niche with brand new approach:
+
+![Picture of dialog]( https://i.imgur.com/yeyOuX5_d.webp?maxwidth=760&fidelity=grand )
+
+Description of functionality:
+
 - First, user selects desirable Hue level using top slider
 - Saturation/Luminosity gradient below shows color variations of current hue
 - Clicking/moving mouse on gradient selects one specific color (and button `OK` become enabled)
@@ -17,9 +17,9 @@ Description of functionality:
 - Right from "New color" block there is "Old color" if dialog was called with some original color (to compare)
 - Each value, hex or dec, can be typed directly (and confirmed with `Enter`) or pasted from
   Clipboard (using button on the left of the field)
-  > Note that pasted text can be any free text taken from CSS, for example. Strings like
-  `#p1 {background-color: #ff0000;}   /* red */` will be correctly parsed, catchig first matching
-  RGB hex value (here `ff0000`)
+  > Note that pasted text can be any free text taken from CSS, for example. Strings like
+  `#p1 {background-color: #ff0000;}   /* red */` will be correctly parsed, catchig first matching
+  RGB hex value (here `ff0000`)
 - Right from Dec/Hex fields there is ❍ (copy to Clipboard) button. Old color also can be copied
 - Once color is selected, "Luminosity palette" is filled with 11 variations of current color,
   where H/S is the same and "Luminosity" level vary from 0 to 100 with step 10 - these
@@ -28,28 +28,31 @@ Description of functionality:
 - When you click with *left* mouse button on "Favorite color" sample, its color become selected.
   *Right* click deletes this sample
 - "Favorite colors" also can be *generated*: right click on favorite area and select 16-color
-  Apple's palette or click "Standard 6 level" to generate 216-colors palette, where each
-  color has 6-level variations of RGB components /easier to try than explain :) /.
-  From the same popup you can clear favorites
+  Apple's palette or click "Standard 6 level" to generate 216-colors palette, where each
+  color has 6-level variations of RGB components /easier to try than explain :) /.
+  From the same popup you can clear favorites
 - "Favorite colors" are saved between dialog calls, but lost when you exit application
 
 Usage:
 
+Reference necessary DLLs: [System.Memory](https://www.nuget.org/packages/System.Memory) 
+and [System.Runtime.CompilerServices.Unsafe](https://www.nuget.org/packages/System.Runtime.CompilerServices.Unsafe/)
+
 ```C#
 var dlg = new SelectColorDlg(Colors.Bisque) { Owner = this };
 if (dlg.ShowDialog() == true) {
     var color = dlg.SelectedColor;// as Color struct
     var brush = dlg.SelectedBrush;// the same, but as SolidColorBrush
 }
 ```
-
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-
-WPFColorLib also contains a few helpers in a static class `ClrHlp`:
-
+
+-------------------------------------------------------------------------------------
+
+WPFColorLib also contains a few helpers in a static class `ClrHlp`:
+
 - ColorToHSL - convert `Color` struct to (H, S, L) presentation (H=0..359, S=0..100, L=0..100)
 - Hex2color - takes free text with hex RGB presentation and returns created `Color`
 - Color2hex - takes `Color` and returns hex RGB presentation
 - Hex2Byte - parse hex byte presentation to native `byte` type
 - HSL2RGB - convert (H,S,L) color to its RGB presentation (as array of 3 `int`s)
-- HSL2RGBInt - the same as `HSL2RGB`, but returns RGB components packed into integer
+- HSL2RGBInt - the same as `HSL2RGB`, but returns RGB components packed into integer