Return of async method

Question

I have async method:

public  async Task CreateAndWriteAsyncToFile()
        {
            using (FileStream stream = new FileStream("test.dat", FileMode.Create,FileAccess.Write, FileShare.None, 4096, true))
            {
                byte[] data = new byte[100000];
                new Random().NextBytes(data);

                await  stream.WriteAsync(data, 0, data.Length);
            }
        }

Compiler complains :

The return type of async method must be void, Task or Task not all code paths returns value.

How to solve this method

Answer 1

There's nothing wrong with your code, the issue seems that you have another Task type defined somewhere in your project. change the method signature to:

public async System.Threading.Tasks.Task CreateAndWriteAsyncToFile(){ ... }

Answer 2

Just to be sure, check if you did import the System.Threading.Tasks namespace. If you accidentally created a Task class (Visual Studio will suggest you to create a class if it doesn't exists) be sure to remove it.