C# Error CS8411 – Asynchronous foreach statement cannot operate on variables of type ‘{0}’ because ‘{0}’ does not contain a suitable public instance or extension definition for ‘{1}’

C# Error

CS8411 – Asynchronous foreach statement cannot operate on variables of type ‘{0}’ because ‘{0}’ does not contain a suitable public instance or extension definition for ‘{1}’

Reason for the Error & Solution

Asynchronous foreach statement cannot operate on variables of type ‘type’ because ‘type’ does not contain a suitable public instance definition for ‘GetAsyncEnumerator’

await foreach statement operates only on types having a definition of GetAsyncEnumerator, such as IAsyncEnumerable<T>.

To correct this error

Replace await foreach with foreach.

Example

using System.Collections.Generic;
using System.Threading.Tasks;

class Program
{
    async Task Example(IAsyncEnumerator<int> enumerator)
    {
        // error CS8411: Asynchronous foreach statement cannot operate on variables
        // of type 'IAsyncEnumerator<T>' because 'IAsyncEnumerator<T>' does not
        // contain a suitable public instance definition for 'GetAsyncEnumerator'
        await foreach (int i in enumerator)
        {
        }
    }
}