![Operation is not valid while ItemsSource is in use. Access and modify elements with ItemsControl.ItemsSource instead." with no known cause - Microsoft Q&A Operation is not valid while ItemsSource is in use. Access and modify elements with ItemsControl.ItemsSource instead." with no known cause - Microsoft Q&A](https://techprofile.blob.core.windows.net/images/c16866ad6ce74b5db35876d6e736f077.png)
Operation is not valid while ItemsSource is in use. Access and modify elements with ItemsControl.ItemsSource instead." with no known cause - Microsoft Q&A
Exceção não tratada no aplicativo... Não foi possível carregar o arquivo ou a montagem 'Microsoft.mshtml" ao abrir um Relatório HTML no Editor de Modelos no PowerInspect
![c# - ''EditItem' is not allowed for this view.' when trying to edit a item in the DataGrid - Stack Overflow c# - ''EditItem' is not allowed for this view.' when trying to edit a item in the DataGrid - Stack Overflow](https://i.stack.imgur.com/nzVw9.png)
c# - ''EditItem' is not allowed for this view.' when trying to edit a item in the DataGrid - Stack Overflow
![System.NullReferenceException in Datagrid.Items (export DataGrid.Items into PDF), in WPF (by C#) - Microsoft Q&A System.NullReferenceException in Datagrid.Items (export DataGrid.Items into PDF), in WPF (by C#) - Microsoft Q&A](https://learn-attachment.microsoft.com/api/attachments/169344-interactivity.png?platform=QnA)
System.NullReferenceException in Datagrid.Items (export DataGrid.Items into PDF), in WPF (by C#) - Microsoft Q&A
System.InvalidOperationException: "The current SynchronizationContext may not be used as a TaskScheduler." error occurs when a Ribbon item is clicked | DevExpress Support
![wpf - InvalidOperationException causing break in Visual Studio even when handled in C# code - Stack Overflow wpf - InvalidOperationException causing break in Visual Studio even when handled in C# code - Stack Overflow](https://i.stack.imgur.com/1M2EU.png)
wpf - InvalidOperationException causing break in Visual Studio even when handled in C# code - Stack Overflow
Cannot load Model designer in XAF Blazor - Could not load file or assembly ' System.Private.ServiceModel error | DevExpress Support
![System.NullReferenceException in Datagrid.Items (export DataGrid.Items into PDF), in WPF (by C#) - Microsoft Q&A System.NullReferenceException in Datagrid.Items (export DataGrid.Items into PDF), in WPF (by C#) - Microsoft Q&A](https://learn-attachment.microsoft.com/api/attachments/169381-platform.png?platform=QnA)
System.NullReferenceException in Datagrid.Items (export DataGrid.Items into PDF), in WPF (by C#) - Microsoft Q&A
![System.NullReferenceException in Datagrid.Items (export DataGrid.Items into PDF), in WPF (by C#) - Microsoft Q&A System.NullReferenceException in Datagrid.Items (export DataGrid.Items into PDF), in WPF (by C#) - Microsoft Q&A](https://learn-attachment.microsoft.com/api/attachments/169166-error.png?platform=QnA)
System.NullReferenceException in Datagrid.Items (export DataGrid.Items into PDF), in WPF (by C#) - Microsoft Q&A
![System.NullReferenceException in Datagrid.Items (export DataGrid.Items into PDF), in WPF (by C#) - Microsoft Q&A System.NullReferenceException in Datagrid.Items (export DataGrid.Items into PDF), in WPF (by C#) - Microsoft Q&A](https://learn-attachment.microsoft.com/api/attachments/169391-references-and-nuget-packages.jpg?platform=QnA)
System.NullReferenceException in Datagrid.Items (export DataGrid.Items into PDF), in WPF (by C#) - Microsoft Q&A
InvalidProtocolBufferException: Protocol message was too large. · Issue #4027 · dotnet/machinelearning · GitHub
![c# - System.BadImageFormatException:Could not load file or assembly … incorrect format when trying to install service with installutil.exe - Stack Overflow c# - System.BadImageFormatException:Could not load file or assembly … incorrect format when trying to install service with installutil.exe - Stack Overflow](https://i.stack.imgur.com/nEh5w.jpg)