public async void Editar(DatosAlumnos a)
{
var json = JsonConvert.SerializeObject(a);
var result = await cliente.PutAsync("practica4/Alumnos", new StringContent(json, Encoding.UTF8, "application/json"));
result.EnsureSuccessStatusCode();
}
public async void Eliminar(DatosAlumnos a)
{
var json = JsonConvert.SerializeObject(a);
HttpRequestMessage message = new HttpRequestMessage(HttpMethod.Delete, "practica4/Alumnos");
message.Content = new StringContent(json, Encoding.UTF8, "application/json");
var result = await cliente.SendAsync(message);
result.EnsureSuccessStatusCode();
}