This is handy when writing .NET functions in Azure.

HttpRequestExtensions.cs

public static class HttpRequestExtensions
{
    public static bool TryGetBody<T>(this HttpRequest req, out T value, out Exception exception)
    {
        if (!req.TryGetBody(out var bytes, out exception))
        {
            value = default;
            return false;
        }

        try
        {
            var json = BitConverter.ToString(bytes);
            value = JsonConvert.DeserializeObject<T>(json);
            exception = default;
            return true;
        }
        catch (Exception ex)
        {
            value = default;
            exception = ex;
            return false;
        }
    }

    public static bool TryGetBody(this HttpRequest req, out byte[] value, out Exception exception)
    {
        try
        {
            if ((req.Body?.Length ?? 0) == 0)
            {
                throw new Exception("HttpRequest has no body.");
            }
            value = GetBytes();
            exception = default;
            return true;
        }
        catch (Exception ex)
        {
            value = default;
            exception = ex;
            return false;
        }

        byte[] GetBytes()
        {
            byte[] bytes;
            using (var ms = new MemoryStream())
            {
                req.Body.CopyTo(ms);
                bytes = ms.ToArray();
            }
            return bytes;
        }
    }
}