public class MyService : RestClient
{
	public MyService(string baseUrl) : base(baseUrl)
	{
	}

	public async Task<User[]> GetUsers(string searchText)
	{
		return await Get($"{BaseUrl}/users")
			.QueryParameter("search", searchText)
			.ReadJson<User[]>();
	}
	public async Task UpdateUser(User user, bool activate)
	{
		await Post($"{BaseUrl}/users/update")
			.QueryParameter("activate", activate)
			.JsonContent(user)
			.ReadString();
	}
}

try
{
	MyService myService = new("http://api.exmample.com");
	User[] users = await myService.GetUsers();
}
catch (RestException ex)
{
	Console.WriteLine(ex.StatusCode);
	Console.WriteLine(ex.Content); // The HTML body
}

public class MyService : RestClient
{
	public MyService(string baseUrl) : base(baseUrl)
	{
		RequestOptions.QueryParameterDateTimeFormat = "dd.MM.yyyy HH:mm:ss";
		RequestOptions.QueryParameterDateOnlyFormat = "dd.MM.yyyy";
		RequestOptions.QueryParameterTimeOnlyFormat = "HH:mm:ss";
	}
}