some fixes.

Runtime/painting/border_radius.cs

                 return hashCode;
             }
         }
+        
+        public static bool operator ==(BorderRadius a, BorderRadius b) {
+            return Equals(a, b);
+        }
+
+        public static bool operator !=(BorderRadius a, BorderRadius b) {
+            return !Equals(a, b);
+        }
 
         public override string ToString() {
             string visual = null;

Runtime/ui/text.cs

             return this.width.GetHashCode();
         }
 
+        public static bool operator ==(ParagraphConstraints left, ParagraphConstraints right) {
+            return Equals(left, right);
+        }
+
+        public static bool operator !=(ParagraphConstraints left, ParagraphConstraints right) {
+            return !Equals(left, right);
+        }
+
         public override string ToString() {
             return $"Width: {this.width}";
         }
         public readonly double letterSpacing = 0.0;
         public readonly double wordSpacing = 0.0;
         public readonly TextBaseline textBaseline = TextBaseline.alphabetic;
-        public double height = 1.0;
+        public readonly double height = 1.0;
         public readonly TextDecoration decoration = TextDecoration.none;
         public readonly Color decorationColor;
         public readonly TextDecorationStyle decorationStyle = TextDecorationStyle.solid;