DYN-7758: Clearer ByMeshColor error message (#15633)

Co-authored-by: Trygve Wastvedt <[email protected]>

src/Libraries/GeometryColor/GeometryColor.cs

@@ -197,7 +197,7 @@ public static GeometryColor ByPointsColors([KeepReferenceAttribute]Point[] point
         /// Display mesh by single color, per-face colors, per-vertex colors, or per-face-vertex colors.
         /// </summary>
         /// <param name="mesh"></param>The Mesh on which to apply the colors
-        /// <param name="colors">The color count must equal 1 (single color), or equal the face count (per-face color), or equal the vertex count (per-vertex) color, or equal the triangle count multiplied by three (per-face-vertex color)</param>
+        /// <param name="colors">The color count must equal 1 (single color), or equal the face count (per-face color), or equal the vertex count (per-vertex color), or equal the triangle count multiplied by three (per-triangle-vertex color)</param>
         /// <param name="smoothShading">If true, shading will look smooth instead of faceted, useful for visualizing smooth continuous surfaces</param>
         /// <returns>A Display object.</returns>
         public static GeometryColor ByMeshColors(
@@ -390,7 +390,7 @@ public static GeometryColor ByMeshColors(
 
             else
             {
-                throw new ArgumentException("Color count is invalid");
+                throw new ArgumentException(Resources.ByMeshColorsInvalidColorCountMessage);
             }
 
             return new GeometryColor(vertexPositionsByTriangle, vertexColorsByTriangle, vertexNormalsByTriangle);

src/Libraries/GeometryColor/Properties/Resources.en-US.resx

@@ -135,4 +135,7 @@
   <data name="VerticesDivisibleByThreeExceptionMessage" xml:space="preserve">
     <value>The number of vertices supplied must be divisible by three.</value>
   </data>
-</root>
+  <data name="ByMeshColorsInvalidColorCountMessage" xml:space="preserve">
+      <value>The color count is invalid. It must equal 1 (single color), or equal the face count (per-face color), or equal the vertex count (per-vertex color), or equal the triangle count multiplied by three (per-triangle-vertex color). If you want to color multiple meshes, you may need to use List Levels.</value>
+  </data>
+</root>

src/Libraries/GeometryColor/Properties/Resources.resx

@@ -135,4 +135,7 @@
   <data name="VerticesDivisibleByThreeExceptionMessage" xml:space="preserve">
     <value>The number of vertices supplied must be divisible by three.</value>
   </data>
-</root>
+  <data name="ByMeshColorsInvalidColorCountMessage" xml:space="preserve">
+      <value>The color count is invalid. It must equal 1 (single color), or equal the face count (per-face color), or equal the vertex count (per-vertex color), or equal the triangle count multiplied by three (per-triangle-vertex color). If you want to color multiple meshes, you may need to use List Levels.</value>
+  </data>
+</root>