[c#] Return list from async/await method

I want to make a webservice request asynchron. I call it here:

List<Item> list = GetListAsync();

Here is the declaration of my function, which should return a list:

private async Task<List<Item>> GetListAsync(){
    List<Item> list = await Task.Run(() => manager.GetList());
    return list;
}

If I want to compile I get the following error

Cannot implicitely convert type System.Threading.Tasks.Task<System.Collections.Generic.List<Item>> to System.Collections.Generic.List<Item>

As I know If I use the async modifier the result is automatically wrapped with Task. I think this doesn't happen because I use Task.Run. If I remove the Task.Run(() => part I get

Cannot await System.Collections.Generic.List expression

I think I haven't fully understood the async/await methods. What I'm doing wrong?

In addition to @takemyoxygen's answer the convention of having a function name that ends in Async is that this function is truly asynchronous. I.e. it does not start a new thread and it doesn't simply call Task.Run. If that is all the code that is in your function, it will be better to remove it completely and simply have:

List<Item> list = await Task.Run(() => manager.GetList());

Works for me:

List<Item> list = Task.Run(() => manager.GetList()).Result;

in this way it is not necessary to mark the method with async in the call.

Instead of doing all these, one can simply use ".Result" to get the result from a particular task.

eg: List list = GetListAsync().Result;

Which as per the definition => Gets the result value of this Task < TResult >

you can use the following

private async Task<List<string>> GetItems()
{
    return await Task.FromResult(new List<string> 
    { 
      "item1", "item2", "item3" 
    });
}