Error: System.InvalidOperationException: Collection was modified; enumeration operation may not execute

Rashmi

1222 Points

22 Posts

Gettting following error:

Error: System.InvalidOperationException: Collection was modified; enumeration operation may not execute.

var targets = split.Panes.Where(p => p is DockManagerContentPaneState cp && cp.Id == id);
if (targets != null)
{
    foreach (var target in targets)
    {
        split.Panes.Remove(target);
    }                
    return true;
}

.net-9.0 c#entity-framework-core

Views: 113
Total Answered: 0
Total Marked As Answer: 0
Posted On: 25-Sep-2025 23:23

Share:

Answers

Discussion

SignalR for real-time web functionality

MVC Design pattern

What is the current status of artif...

Modern Web Development using ASP.NE...

Is Programming an Art or a Science?

Blazor is a UI Web framework for bu...

Generative AI refers to artificial ...

How to open OST files without Exch...

Blog

How to Create Promotional Posts or Promote Products on NiceOneCode?

How to Unfollow, Accept, or Reject Friend Request on NiceOneCode?

How to Follow or Send a Friend Request on NiceOneCode?

Migrating from .NET 9.0 to .NET 10.0 - A Complete Guide Including ASP.NET Core, EF Core, MAUI, Uno, and Blazor Server

Active User (25)

Log In to Chat

© 2026 niceonecode.com. All rights reserved

| Blog | Tools | Sitemap

| Time Zone:

|

youtube