private async void button2_Click(object sender, EventArgs e)
{
string jsonString = await service.GetStringAsync(new Uri("http://localhost:55482/EquationGeneratorService.svc/equation/"+operation+"/"+level));
DataContractJsonSerializer jsonSerializer = new DataContractJsonSerializer(typeof(Equation));
currentEquation =
(Equation)jsonSerializer.ReadObject(new MemoryStream(Encoding.Unicode.GetBytes(jsonString)));
Console.WriteLine(jsonString + currentEquation.Result);
label1.Text = currentEquation.LeftHandSide;
button1.Enabled = true;
textBox1.Enabled = true;
}