Implement read logic.

Author: michaelgwelch

.vscode/launch.json

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+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": ".NET Core Launch (console)",
+            "type": "coreclr",
+            "request": "launch",
+            "preLaunchTask": "build",
+            "program": "${workspaceFolder}/bin/Debug/net6.0/carol-poc.dll",
+            "args": [],
+            "cwd": "${workspaceFolder}",
+            "console": "internalConsole",
+            "stopAtEntry": false
+        },
+        {
+            "name": ".NET Core Attach",
+            "type": "coreclr",
+            "request": "attach"
+        }
+    ]
+}

.vscode/tasks.json

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+{
+    "version": "2.0.0",
+    "tasks": [
+        {
+            "label": "build",
+            "command": "dotnet",
+            "type": "process",
+            "args": [
+                "build",
+                "${workspaceFolder}/carol-poc.csproj",
+                "/property:GenerateFullPaths=true",
+                "/consoleloggerparameters:NoSummary"
+            ],
+            "problemMatcher": "$msCompile"
+        },
+        {
+            "label": "publish",
+            "command": "dotnet",
+            "type": "process",
+            "args": [
+                "publish",
+                "${workspaceFolder}/carol-poc.csproj",
+                "/property:GenerateFullPaths=true",
+                "/consoleloggerparameters:NoSummary"
+            ],
+            "problemMatcher": "$msCompile"
+        },
+        {
+            "label": "watch",
+            "command": "dotnet",
+            "type": "process",
+            "args": [
+                "watch",
+                "run",
+                "--project",
+                "${workspaceFolder}/carol-poc.csproj"
+            ],
+            "problemMatcher": "$msCompile"
+        }
+    ]
+}

Program.cs

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+// The built-in .Net HttpClient could be used
+// But flurl has a nicer API and deserializes the JSON for us
+using Flurl.Http;
+
+var host = "{provide host}";
+var username = "{provide username}";
+
+// For test systems only. Never embed plain text passwords in your code.
+var password = "{provide password}";
+
+// Object IDs are available within MUI or using GET /objectIdentifiers?fqr={fqr}
+var object1Id = "960534d2-7df5-5ed8-884c-164e7a2f280a";
+var object2Id = "c82d160b-884c-5eac-bad4-89754f0069e0";
+
+// Login and get a token
+string accessToken;
+
+using (var client = new FlurlClient($"https://{host}/api/v3"))
+{
+    var loginObject = new
+    {
+        Username = username,
+        Password = password
+    };
+
+    // This line invokes the operation: POST /api/v3/login
+    accessToken = (await client.Request($"https://{host}/api/v3/login").PostJsonAsync(loginObject)
+        .ReceiveJson()).accessToken;
+}
+
+// Use the token to read two attributes
+
+// Creates an http client with base url of our API and using the access token
+using (var client = new FlurlClient($"https://{host}/api/v3").WithOAuthBearerToken(accessToken))
+{
+    // The next two lines actually read the present value of 2 objects.
+    // They are invoking the operation: GET /objects/{id}/attributes/presentValue
+    var attribute1Response = await client.Request($"https://{host}/api/v3/objects/{object1Id}/attributes/presentValue").GetJsonAsync();
+    var attribute2Response = await client.Request($"https://{host}/api/v3/objects/{object2Id}/attributes/presentValue").GetJsonAsync();
+
+    // The next two lines take advantage of the fact that attribute1Response
+    // and attribute2Response are dynamic objects that allow us to query the
+    // responses with properties.
+    Console.WriteLine($"Value 1: {attribute1Response.item.presentValue}");
+    Console.WriteLine($"Value 2: {attribute2Response.item.presentValue}");
+}

carol-poc.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <RootNamespace>carol_poc</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Flurl.Http" Version="3.2.2" />
+    <PackageReference Include="NewtonSoft.Json" Version="13.0.1" />
+  </ItemGroup>
+
+</Project>