diff --git a/src/Avalonia.Controls/ColumnDefinitions.cs b/src/Avalonia.Controls/ColumnDefinitions.cs
index ed4f9dbe99..7e355ab357 100644
--- a/src/Avalonia.Controls/ColumnDefinitions.cs
+++ b/src/Avalonia.Controls/ColumnDefinitions.cs
@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Specialized;
 using System.Linq;
+using System.Text;
 using Avalonia.Collections;
 
 namespace Avalonia.Controls
@@ -13,7 +14,7 @@ namespace Avalonia.Controls
         /// <summary>
         /// Initializes a new instance of the <see cref="ColumnDefinitions"/> class.
         /// </summary>
-        public ColumnDefinitions() : base ()
+        public ColumnDefinitions()
         {
         }
 
@@ -27,6 +28,11 @@ namespace Avalonia.Controls
             AddRange(GridLength.ParseLengths(s).Select(x => new ColumnDefinition(x)));
         }
 
+        public override string ToString()
+        {
+            return string.Join(",", this.Select(x => x.Width));
+        }
+
         /// <summary>
         /// Parses a string representation of column definitions collection.
         /// </summary>
@@ -34,4 +40,4 @@ namespace Avalonia.Controls
         /// <returns>The <see cref="ColumnDefinitions"/>.</returns>
         public static ColumnDefinitions Parse(string s) => new ColumnDefinitions(s);
     }
-}
\ No newline at end of file
+}
diff --git a/src/Avalonia.Diagnostics/Diagnostics/ViewModels/PropertyViewModel.cs b/src/Avalonia.Diagnostics/Diagnostics/ViewModels/PropertyViewModel.cs
index ddbdae7ed9..e23d6f1471 100644
--- a/src/Avalonia.Diagnostics/Diagnostics/ViewModels/PropertyViewModel.cs
+++ b/src/Avalonia.Diagnostics/Diagnostics/ViewModels/PropertyViewModel.cs
@@ -8,8 +8,8 @@ namespace Avalonia.Diagnostics.ViewModels
     internal abstract class PropertyViewModel : ViewModelBase
     {
         private const BindingFlags PublicStatic = BindingFlags.Public | BindingFlags.Static;
-        private static readonly Type[] StringParameter = new[] { typeof(string) };
-        private static readonly Type[] StringIFormatProviderParameters = new[] { typeof(string), typeof(IFormatProvider) };
+        private static readonly Type[] StringParameter = { typeof(string) };
+        private static readonly Type[] StringIFormatProviderParameters = { typeof(string), typeof(IFormatProvider) };
 
         public abstract object Key { get; }
         public abstract string Name { get; }
@@ -26,35 +26,46 @@ namespace Avalonia.Diagnostics.ViewModels
             }
 
             var converter = TypeDescriptor.GetConverter(value);
-            return converter?.ConvertToString(value) ?? value.ToString();
+
+            //CollectionConverter does not deliver any important information. It just displays "(Collection)".
+            if (!converter.CanConvertTo(typeof(string)) || 
+                converter.GetType() == typeof(CollectionConverter))
+            {
+                return value.ToString();
+            }
+
+            return converter.ConvertToString(value);
         }
 
-        protected static object ConvertFromString(string s, Type targetType)
+        private static object InvokeParse(string s, Type targetType)
         {
-            var converter = TypeDescriptor.GetConverter(targetType);
-            
-            if (converter != null && converter.CanConvertFrom(typeof(string)))
+            var method = targetType.GetMethod("Parse", PublicStatic, null, StringIFormatProviderParameters, null);
+
+            if (method != null)
             {
-                return converter.ConvertFrom(null, CultureInfo.InvariantCulture, s);
+                return method.Invoke(null, new object[] { s, CultureInfo.InvariantCulture });
             }
-            else
+
+            method = targetType.GetMethod("Parse", PublicStatic, null, StringParameter, null);
+
+            if (method != null)
             {
-                var method = targetType.GetMethod("Parse", PublicStatic, null, StringIFormatProviderParameters, null);
+                return method.Invoke(null, new object[] { s });
+            }
 
-                if (method != null)
-                {
-                    return method.Invoke(null, new object[] { s, CultureInfo.InvariantCulture });
-                }
+            throw new InvalidCastException("Unable to convert value.");
+        }
 
-                method = targetType.GetMethod("Parse", PublicStatic, null, StringParameter, null);
+        protected static object ConvertFromString(string s, Type targetType)
+        {
+            var converter = TypeDescriptor.GetConverter(targetType);
 
-                if (method != null)
-                {
-                    return method.Invoke(null, new object[] { s });
-                }
+            if (converter.CanConvertFrom(typeof(string)))
+            {
+                return converter.ConvertFrom(null, CultureInfo.InvariantCulture, s);
             }
 
-            throw new InvalidCastException("Unable to convert value.");
+            return InvokeParse(s, targetType);
         }
     }
 }
diff --git a/src/Windows/Avalonia.Win32/WindowImpl.cs b/src/Windows/Avalonia.Win32/WindowImpl.cs
index ddc0cc4e42..4929283874 100644
--- a/src/Windows/Avalonia.Win32/WindowImpl.cs
+++ b/src/Windows/Avalonia.Win32/WindowImpl.cs
@@ -1007,10 +1007,12 @@ namespace Avalonia.Win32
                 if (newProperties.IsResizable)
                 {
                     style |= WindowStyles.WS_SIZEFRAME;
+                    style |= WindowStyles.WS_MAXIMIZEBOX;
                 }
                 else
                 {
                     style &= ~WindowStyles.WS_SIZEFRAME;
+                    style &= ~WindowStyles.WS_MAXIMIZEBOX;
                 }
 
                 SetStyle(style);