Xamarin Dump HASH for use in Facebook Android SDK (instead of using keytool)

hash_for_facebooksdk

void DumpKeyHashes()
{
    try
    {
        using (var sha = new System.Security.Cryptography.SHA1CryptoServiceProvider())
        {
            //Retriving package info
            var packageName = ApplicationContext.PackageName;
            System.Diagnostics.Debug.WriteLine("#### PACKAGE NAME: " + packageName);
            var packageInfo = this.PackageManager.GetPackageInfo(packageName, PackageInfoFlags.Signatures);

            foreach (var signature in packageInfo.Signatures)
            {
                var sigBytes = signature.ToByteArray();

                // This is one implementation of the abstract class SHA1.
                var result = sha.ComputeHash(sigBytes);
                System.Diagnostics.Debug.WriteLine("#### SHA1 KEY: " + BitConverter.ToString(result).Replace('-', ':'));
                var key = System.Convert.ToBase64String(result);
                System.Diagnostics.Debug.WriteLine("#### HASH KEY: " + key);
            }
        }
    }
    catch (Exception ex)
    {
        System.Diagnostics.Debug.WriteLine("#### HASH KEY EXCEPTION:" + ex.Message);
    }
}