System.Interactive.Async call is ambiguous error when IX-Async is referenced #18124
Description
I'm using .NET Core 3.0 with EF Core and System.Interactive.Async. Using methods like FirstOrDefaultAsync and Where results in compilation errors like
The call is ambiguous between the following methods or properties: 'Microsoft.EntityFrameworkCore.EntityFrameworkQueryableExtensions.FirstOrDefaultAsync<TSource>(System.Linq.IQueryable<TSource>, System.Linq.Expressions.Expression<System.Func<TSource, bool>>, System.Threading.CancellationToken)' and 'System.Linq.AsyncEnumerable.FirstOrDefaultAsync<TSource>(System.Collections.Generic.IAsyncEnumerable<TSource>, System.Func<TSource, bool>, System.Threading.CancellationToken)'
The call is ambiguous between the following methods or properties: 'System.Linq.Queryable.Where<TSource>(System.Linq.IQueryable<TSource>, System.Linq.Expressions.Expression<System.Func<TSource, bool>>)' and 'System.Linq.AsyncEnumerable.Where<TSource>(System.Collections.Generic.IAsyncEnumerable<TSource>, System.Func<TSource, bool>)'
Steps to reproduce
- Reference EFCore.
- Reference System.Interactive.Async
public class FruitDb : DbContext
{
public DbSet<Apple> Apples { get; set; }
public async Task Seeds5Async()
{
Apple apple = await Apples.FirstOrDefaultAsync(x => x.NumSeeds == 5);
// ... use it
}
}Further technical details
EF Core version: 3.0.0
Database provider: Sqlite
Target framework: .NET Core 3.0
Operating system: Windows 10
IDE: Visual Studio 2019 16.3