Change filename for IFormFile before upload to azure blob storege

I am trying change filename for IFormFile before uploading it to azure blob storage but my current solution is not working

 public async Task<ExecuteResult> UploadAsync(string name, IFormFile file, CancellationToken cancellationToken)
    {
        try
        {
          using (var fileStream = new FileStream(Path.Combine("", name), FileMode.Create))
          {
                await file.CopyToAsync(fileStream);
          }

        BlobClient client = _client.GetBlobClient(file.FileName);

        await using (Stream? data = file.OpenReadStream())
        {
            await client.UploadAsync(data, true, cancellationToken);
        }
            return ExecuteResult.Success();
        }
        catch (RequestFailedException ex)
            when (ex.ErrorCode == BlobErrorCode.BlobAlreadyExists)
        {
            await UploadFileAsync(file, cancellationToken);

            return ExecuteResult.Success();
        }
        catch (RequestFailedException ex)
        {
            return ExecuteResult.Fail(new Error($"Unhandled Exception. ID: {ex.StackTrace} - Message: {ex.Message}", ""));
        }
    }

Any suggestions on how to fix it ?

SOLUTION

The problem is my misunderstanding of the file upload, if you are interested in saving the file under a different name you should put it in the line

                BlobClient client = _client.GetBlobClient($"{name}{format}");

Complete solution

public async Task<ExecuteResult> UploadAsync(string name, IFormFile file, CancellationToken cancellationToken)
    {
        try
        {
            string format = Path.GetExtension(file.FileName);

            BlobClient client = _client.GetBlobClient($"{name}{format}");

            await using (Stream? data = file.OpenReadStream())
            {
                await client.UploadAsync(data, true, new CancellationToken());
            }

            return ExecuteResult.Success();
        }
        catch (RequestFailedException ex)
        {
            return ExecuteResult.Fail(new Error($"Unhandled Exception. ID: {ex.StackTrace} - Message: {ex.Message}", ""));
        }
    }

SOLUTION

The problem is my misunderstanding of the file upload, if you are interested in saving the file under a different name you should put it in the line

            BlobClient client = _client.GetBlobClient($"{name}{format}");

Complete solution

 public async Task<ExecuteResult> UploadAsync(string name, IFormFile file, 
  CancellationToken cancellationToken)
{
    try
    {
        string format = Path.GetExtension(file.FileName);

        BlobClient client = _client.GetBlobClient($"{name}{format}");

        await using (Stream? data = file.OpenReadStream())
        {
            await client.UploadAsync(data, true, new CancellationToken());
        }

        return ExecuteResult.Success();
    }
    catch (RequestFailedException ex)
    {
        return ExecuteResult.Fail(new Error($"Unhandled Exception. ID: {ex.StackTrace} - Message: {ex.Message}", ""));
    }
}