After the file upload is completed, the local file is still occupied

[jdwight123]

Use the following code to upload a file.After the file upload is completed,the local file is still occupied.
public async Task Upload(string filePath, string bucketName, string objectName)
{
var fileInfo = new FileInfo(filePath);
var putObjectAgs = new PutObjectArgs()
.WithBucket(bucketName)
.WithObject(objectName)
.WithFileName(filePath)
.WithObjectSize(fileInfo.Length);

        await _minioClient.PutObjectAsync(putObjectAgs).ConfigureAwait(false);
        return objectName;
    }