{
"Threads":
{
    "Program1" :
    {
        "Filepath": "C:\ProgramFiles(x86)...",
        "Priority": 0
    },
    "Program2" :
    {
        "Filepath": "C:\ProgramFiles(x86)...",
        "Priority": 1
    },
    "Program3" :
    {
        "Filepath": "C:\ProgramFiles(x86)...",
        "Priority": 3
    }
}}

JObject jsonFile = JObject.Parse(textFile);
JToken jsonRobotsByPriority = new JObject(jsonFile["Threads"].OrderBy(obj => (int) obj["Priority"] ) );