make a http request with a custom body as json and return a json response in csharp

main.cs
using System;
using System.Net.Http;
using System.Text.Json;
using System.Threading.Tasks;

public async Task<TResponse> PostAsync<TRequest, TResponse>(string url, TRequest request)
{
    using (var httpClient = new HttpClient())
    {
        var jsonRequest = JsonSerializer.Serialize(request);
        var content = new StringContent(jsonRequest, System.Text.Encoding.UTF8, "application/json");

        var response = await httpClient.PostAsync(url, content);

        var jsonResponse = await response.Content.ReadAsStringAsync();
        if (!response.IsSuccessStatusCode)
        {
            throw new HttpRequestException($"Request failed with status code {response.StatusCode} and content: {jsonResponse}");
        }

        return JsonSerializer.Deserialize<TResponse>(jsonResponse);
    }
}
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main.cs
var request = new MyRequest
{
    // set request properties
};

var response = await PostAsync<MyRequest, MyResponse>("https://example.com/api/my-endpoint", request);

// response properties are now populated
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