While accessing Web API getting 404 Not Found - asp.net

Question

While accessing web Api in xamarin.forms i am getting this error below which is i am unable to Solve
{StatusCode: 404, ReasonPhrase: 'Not Found', Version: 1.1, Content:
System.Net.Http.StreamContent, Headers: { Server: Microsoft-IIS/10.0
X-Powered-By: ASP.NET Date: Fri, 09 Feb 2018 12:50:00 GMT
Content-Type: text/html Content-Length: 1245 }}
This is my web Api Code.
public IList<TCourse> GetData()
{
try
{
using (var context = new HCMSEntities())
{
var cli = (from b in context.tblTrainingCourses
orderby b.CourseID
select new TCourse { CourseID = b.CourseID, Course = b.Course }
).ToList();
return cli;
}
}
catch (Exception ex)
{
return null;
}
}
And here is the code which is consuming the api and i am getting above error.
public async Task Index()
{
List<TCourse> EmpInfo = new List<TCourse>();
try
{
using (var client = new HttpClient())
{
//Passing service base url
client.BaseAddress = new Uri("http://10.20.2.62/");
client.DefaultRequestHeaders.Clear();
//Define request data format
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
//Sending request to find web api REST service resource GetAllEmployees using HttpClient
HttpResponseMessage Res = await client.GetAsync("api/Course");
//Checking the response is successful or not which is sent using HttpClient
if (Res.IsSuccessStatusCode)
{
//Storing the response details recieved from web api
var EmpResponse = Res.Content.ReadAsStringAsync().Result;
//Deserializing the response recieved from web api and storing into the Employee list
EmpInfo = JsonConvert.DeserializeObject<List<TCourse>>(EmpResponse);
}
}
}
catch (Exception e)
{
}
}
The web Api is not deployed.I tried http://localhost/ in base address than i switched to Ip.
no idea whats wrong and where.
kindly Guide.