Sandbox manager to create and refresh sandboxes.

SandboxInfo.cs

public class SandboxInfo
{
    public SandboxInfo()
    {
        AutoActivate = true;
        LicenseType = "DEVELOPER";
        Description = "Sandbox created via API";
    }

    public string SandboxName { get; set; }
    public string Status { get; set; }
    public string Description { get; set; }
    public string LicenseType { get; set; }
    public string ApexClassId { get; set; }
    public bool AutoActivate { get; set; }

    public string ToJSON()
    {
        return $@"
        {{
            ""AutoActivate"": {AutoActivate.ToString().ToLower()},
            ""SandboxName"": ""{SandboxName}"",
            ""Description"": ""{Description}"",
            ""LicenseType"": ""{LicenseType}"",
            ""ApexClassId"": ""{ApexClassId}""
        }}";
    }
}

SandboxManager.cs

public class SandboxManager
{
    private const string SANDBOX_INFO_ENDPOINT = 
        "/services/data/v42.0/tooling/sobjects/SandboxInfo/";

    private const string SANDBOX_PROCESS_ENDPOINT = 
        "/services/data/v42.0/tooling/sobjects/SandboxProcess/";

    private const string QUERY_SANDBOX_INFO =
        "/services/data/v42.0/tooling/query?q=SELECT+Id,SandboxName+FROM+SandboxInfo+WHERE+SandboxName+in+('{name}')";

    private const string QUERY_SANDBOX_PROCESS =
        "/services/data/v42.0/tooling/query?q=SELECT+Id,Status+FROM+SandboxProcess+WHERE+SandboxName+in+('{name}')";

    public SandboxManager(ForceClient client)
    {
        Client = client;
    }

    private ForceClient Client { get; }

    public void CreateSandbox(SandboxInfo info)
    {
        var response = Client.Post(SANDBOX_INFO_ENDPOINT, info.ToJSON());
        var stringResponse = response.Content.ReadAsStringAsync().Result;

        Console.WriteLine("\n:: Sandbox created :: \n" + stringResponse);
    }

    public void RefreshSandbox(SandboxInfo info)
    {
        var response = Client.Get(QUERY_SANDBOX_INFO.Replace("{name}", info.SandboxName));
        var stringResponse = response.Content.ReadAsStringAsync().Result;

        Console.WriteLine("\n:: Queried Sandbox :: \n" + stringResponse);

        dynamic queriedSandbox = JObject.Parse(stringResponse);
        string id = queriedSandbox.records[0].Id;

        response = Client.Patch(SANDBOX_INFO_ENDPOINT + $"{id}/", info.ToJSON());
        stringResponse = response.Content.ReadAsStringAsync().Result;

        Console.WriteLine("\n:: Refreshed Sandbox :: \n" + stringResponse);
    }

    public string GetSandboxStatus(SandboxInfo info)
    {
        var response = Client.Get(QUERY_SANDBOX_PROCESS.Replace("{name}", info.SandboxName));
        var stringResponse = response.Content.ReadAsStringAsync().Result;

        dynamic sandboxes = JObject.Parse(stringResponse);
        foreach (var record in sandboxes.records)
            if (record.Status == info.Status)
                return Client.Get("" + record.attributes.url).Content.ReadAsStringAsync().Result;

        return $@"{{""Message"": ""A sandbox with the name {info.SandboxName} and status {
                info.Status
            } does not exist.""}}";
    }
}