Asynchronous Programming (edit)

Asynchronous programming in C# | Microsoft Docs

When to Use (and Not to Use) Asynchronous Programming: 20 Pros Reveal the Best Use Cases – Stackify

Asynchronous Programming :: Eloquent JavaScript

.NET Framework

public string GetString() {
    ...
        
    var resp = response.Content
                .ReadAsStringAsync()
                .ConfigureAwait(false)
                .GetAwaiter()
                .GetResult();
    return resp;
}

.NET Core

public async Task ReadStringAsync() {
    ...
    return await response.Content.ReadAsStringAsync();
}

public async Task ReadStringAsync() {
    ... (no await called)
    return await Task.FromResult(string.Empty);
}