Regressions in System.Collections.Concurrent.AddRemoveFromSameThreads<Int32> · Issue #69733 · dotnet/runtime · GitHub
Operations that change non-concurrent collections must have exclusive access. A concurrent update was performed on this collection and corrupted its state. The collection's state is no longer correct. · Issue #13259 ·
![c# - Missing System.Collection dependency for Microsoft.Extensions.DependencyInjection when using mono - Stack Overflow c# - Missing System.Collection dependency for Microsoft.Extensions.DependencyInjection when using mono - Stack Overflow](https://i.stack.imgur.com/T09UQ.png)