Rest Client in C#

// Get  
public APIResponse GetALMHardwareAPICall(int ID)  
{  
    try  
    {  
        ServicePointManager.Expect100Continue = true;  
        ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls  
            | SecurityProtocolType.Tls11  
            | SecurityProtocolType.Tls12  
            | SecurityProtocolType.Tls13;    
        var APIEndpoint = _config.GetSection("APIBaseURL").Value + "" 
            + _config.GetSection("GetAMLURL").Value                     
            + "?sysparm_offset=" + ID;  
        var authorization = _config.GetSection("authorization").Value;  
        var client = new RestClient(APIEndpoint);  
        var request = new RestRequest(Method.GET);  
        request.AddHeader("Authorization", "Basic " + authorization);  
        IRestResponse response = client.Execute(request);  
        if (response.IsSuccessful)  
        {  
            var resultSet = JsonConvert.DeserializeObject(response.Content);  
            return resultSet;  
        }  
        else  
        {  
            return new APIResponse();  
        }  
    }  
    catch (Exception ex)  
    {  
        return null;  
    }  
}  

POST  
public void POSTAsset(APIRequestCreate model)  
{  
    try  
    {  
        ServicePointManager.Expect100Continue = true;  
        ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls  
            | SecurityProtocolType.Tls11  
            | SecurityProtocolType.Tls12  
            | SecurityProtocolType.Tls13;  
        var _authorization = _config.GetSection("authorization");  
        var APIEndpoint = _config.GetSection("APIBaseURL") + "" + _config.GetSection("CreateUpdateAsset");  
        var client = new RestClient(APIEndpoint);  
        var request = new RestRequest(Method.POST);  
        request.AddHeader("Authorization", "Basic " + _authorization);  
        request.AddHeader("content-type", "application/json");  
        request.AddHeader("Type", "application/x-www-form-urlencoded");  
        request.AddJsonBody(model, "application/json"); // Post Body  
        IRestResponse response = client.Execute(request);  
        if (response.IsSuccessful)  
        {  
            var resultSet = response.Content;  
        }  
    }  
    catch (Exception ex)  
    {  
    }  
}