make code more readable.

src/Avalonia.OpenGL/Angle/AngleEglInterface.cs

@@ -18,11 +18,18 @@ namespace Avalonia.OpenGL.Angle
         static Func<string, IntPtr> LoadAngle()
         {
             if (!RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
+            {
                 throw new PlatformNotSupportedException();
+            }
+            else
             {
                 var disp = eglGetProcAddress("eglGetPlatformDisplayEXT");
+                
                 if (disp == IntPtr.Zero)
+                {
                     throw new OpenGlException("libegl.dll doesn't have eglGetPlatformDisplayEXT entry point");
+                }
+                
                 return eglGetProcAddress;
             }
         }