How to execute different REST API requests in parallel in C# on .NET Core?
Solution 1:
What you need is concurrency (not parallelism - i.e., multiple threads).
Concurrent asynchronous code is done by using Task.WhenAll:
public async Task CallMultipleAPIs()
{
var taskA = GetA("");
var taskB = GetB(1);
var taskC = GetC(1, "");
await Task.WhenAll(taskA, taskB, taskC);
}