Mono.Http/NtlmClient.cs(99,54): error CS1502: The best overloaded method match for `Mono.Security.Protocol.Ntlm.Type3Message.Type3Message(byte[])' has some invalid arguments /usr/lib/mono/gac/Mono.Security/2.0.0.0__0738eb9f132ed756/Mono.Security.dll (Location of the symbol related to previous error) Mono.Http/NtlmClient.cs(99,54): error CS1503: Argument `#1' cannot convert `Mono.Security.Protocol.Ntlm.Type2Message' expression to type `byte[]'