ecdsa key error in vb.net

sessionOptions.SshHostKeyFingerprint = "ecdsa-sha2-nistp256 256 cc:1e:44:73:80:bd:cb:cc:15:9f:5b:15:ae:18:7a:46"

SSH host key fingerprint "ecdsa-sha2-nistp256 256 cc:1e:44:73:80:bd:cb:cc:15:9f:5b:15:ae:18:7a:46" does not match pattern
/((ssh-rsa|ssh-dss)( |-))?(\d+ )?([0-9a-f]{2}(:|-)){15}[0-9a-f]{2}(;((ssh-rsa|ssh-dss)( |-))?(\d+ )?([0-9a-f]{2}(:|-)){15}[0-9a-f]{2})*/