The GetCrcAsync method asynchronously calculates the CRC (Cyclic Redundancy Check) value for a specified file. This method is useful for verifying the integrity of files by generating a unique checksum that can be compared against expected values.

To use the GetCrcAsync method, you need to provide the file path as a string parameter. The method returns a Task<UInt64>, which represents the asynchronous operation. You can await this task to get the CRC value once the operation is complete.

Example usage:

public async Task CheckFileIntegrity(string filePath)
{
    BaseFileSystem fileSystem = new BaseFileSystem();
    ulong crcValue = await fileSystem.GetCrcAsync(filePath);
    // Use crcValue for integrity checks
}