Add STBIWDEF as RFEXTERN to build C file.

ReFuel.StbImage.csproj

@@ -13,7 +13,7 @@
     <!-- Nuget Properties. -->
     <GeneratePackageOnBuild>True</GeneratePackageOnBuild>
     <PackageId>ReFuel.StbImage</PackageId>
-    <Version>2.0-rc</Version>
+    <Version>2.0-rc.3</Version>
     <Authors>STBI Authors, H. Utku Maden</Authors>
     <Description>
       A C# wrapper for the ubiquitous stb_image.h and stb_image_write.h library.

StbImage.cs

@@ -157,7 +157,7 @@ namespace ReFuel.Stb
         /// <remarks>
         /// -1 for auto, 0 through 5 to pick a filter. Higher is more. Not thread safe.
         /// </remarks>
-        public int WriteForcePngFilter
+        public static int WriteForcePngFilter
         {
             get => Stbi.write_force_png_filter;
             set
@@ -177,7 +177,7 @@ namespace ReFuel.Stb
         /// <remarks>
         /// Higher is more. Defaults to 8. Not thread safe.
         /// </remarks>
-        public int WritePngCompressionLevel
+        public static int WritePngCompressionLevel
         {
             get => Stbi.write_png_compression_level;
             set => Stbi.write_png_compression_level = value;
@@ -189,7 +189,7 @@ namespace ReFuel.Stb
         /// <remarks>
         /// Not thread safe.
         /// </remarks>
-        public bool WriteTgaEnableRLE
+        public static bool WriteTgaEnableRLE
         {
             get => Stbi.write_tga_with_rle != 0;
             set => Stbi.write_tga_with_rle = value ? 1 : 0;

rf_stbi.h

@@ -7,6 +7,7 @@
 #define STBI_NO_THREAD_LOCALS 1
 #include "stb/stb_image.h"
 
+#define STBIWDEF RFEXTERN
 #define STBI_WRITE_NO_STDIO 1
 #include "stb/stb_image_write.h"