ColumnDefinitions.Clear() throws an exception

[jeromelaban]

Current behavior

Calling Grid.ColumnDefinitions.Clear() throws an exception.

How to reproduce it (as minimally and precisely as possible)

gridDeviceInfo.ColumnDefinitions.Clear();
gridDeviceInfo.ColumnDefinitions.Add(new ColumnDefinition() { Width = GridLength.Auto });
gridDeviceInfo.ColumnDefinitions.Clear(); //Throws System.InvalidOperationException: Collection was modified; enumeration operation may not execute.

Environment

Nuget Package:

Package Version(s): 1.45

Affected platform(s):

• iOS
• Android
• WebAssembly
• Windows
• Build tasks

Visual Studio

• 2017 (version: )
• 2019 (version: )
• for Mac (version: )

Relevant plugins

• Resharper (version: )

Anything else we need to know?

[carldebilly]

Should use the new MaterializableList to fix this.

[jeromelaban]

Cannot use it, it's a dictionary there.

[carldebilly]

We should create a new MaterializableDictionary using the same patterns ;-)