System.Xaml.XamlException

[chenzanyu]

Describe the bug

Install Avalonia for Visual Studio 2022 template, it automatically installs the Avalonia Template Studio template, create a desktop application, modify the content of MainView.axaml, the designer is throwing an exception, and it reports: "[Error] 34228 UpdateXamlResult error System.Xaml.XamlException: “Name cannot begin with the ‘<’ character, hexadecimal value 0x3C. Line 16, position 1.”

To Reproduce

template program

AvaloniaVS plugin version

0.10.18.4

Avalonia version

11.0.0-rc1.1

Visual Studio version

VisualdStudio2022 Version: 17.63

Relevant log output

01:02:43.434 [Information] 34228 Connection initialized
01:02:53.202 [Error] 34228 UpdateXamlResult error
System.Xaml.XamlException: “Name cannot begin with the '
' character, hexadecimal value 0x0D. Line 15, position 4.”，行号为“15”，行位置为“4”。
01:02:53.827 [Error] 34228 UpdateXamlResult error
System.Xaml.XamlException: “Name cannot begin with the '<' character, hexadecimal value 0x3C. Line 16, position 1.”，行号为“16”，行位置为“1”。
01:02:54.476 [Error] 34228 UpdateXamlResult error
System.Xaml.XamlException: “Name cannot begin with the '<' character, hexadecimal value 0x3C. Line 16, position 1.”，行号为“16”，行位置为“1”。

Additional context

No response

[maxkatz6]

Please add more information. How exactly edited MainView.axaml looks like?

[chenzanyu]

Simply replacing the automatically generated TextBlock with Grid or any other element causes the designer to malfunction until F5 is clicked to run the project again.

[chenzanyu]

The designer works fine after updating to v11.0.0