gistfile1.cs

Session.asp

<%

Response.ContentType = "application/json"

If Request.QueryString("command") = "enumerate" Then
    
    Response.Write("[")
    Response.Write("{""Key"": ""key1"", ""Value"": ""value1"", ""DataType"": ""datatype1""},")
    Response.Write("{""Key"": ""key2"", ""Value"": ""value2"", ""DataType"": ""datatype2""},")
    Response.Write("{""Key"": ""key3"", ""Value"": ""value3"", ""DataType"": ""datatype3""}")
    Response.Write("]")

End If

%>

RestSharp.cs

private readonly RestClient _client = new RestClient("http://localhost/RemoteSessionTestHarness");

public class SessionVariable
{
    public string Key { get; set; }
    public string Value { get; set; }
    public string DataType { get; set; }
}

[Test]
public void Should_Enumerate_Session_Variables()
{
    var result = _client.Execute<List<SessionVariable>>(new RestRequest("session.asp?command=enumerate"));
    result.Data.Count.ShouldEqual(3);
}