System.Security.Claims.ClaimsIdentity.WriteTo C# (CSharp) Method

        public virtual void WriteTo(BinaryWriter writer)
        {
            WriteTo(writer, null);
        }

        /// <summary>
        /// Serializes using a <see cref="BinaryWriter"/>
        /// </summary>
        /// <param name="writer">the <see cref="BinaryWriter"/> to use for data storage.</param>
        /// <param name="userData">additional data provided by derived type.</param>
        /// <exception cref="ArgumentNullException">if 'writer' is null.</exception>
        protected virtual void WriteTo(BinaryWriter writer, byte[] userData)
        {
            if (writer == null)
            {
                throw new ArgumentNullException(nameof(writer));
            }

            int numberOfPropertiesWritten = 0;
            var mask = SerializationMask.None;

            if (_authenticationType != null)
            {
                mask |= SerializationMask.AuthenticationType;
                numberOfPropertiesWritten++;
            }

            if (_bootstrapContext != null)
            {
                string rawData = _bootstrapContext as string;
                if (rawData != null)
                {
                    mask |= SerializationMask.BootstrapConext;
                    numberOfPropertiesWritten++;
                }
            }

            if (!string.Equals(_nameClaimType, ClaimsIdentity.DefaultNameClaimType, StringComparison.Ordinal))
            {
                mask |= SerializationMask.NameClaimType;
                numberOfPropertiesWritten++;
            }

            if (!string.Equals(_roleClaimType, ClaimsIdentity.DefaultRoleClaimType, StringComparison.Ordinal))
            {
                mask |= SerializationMask.RoleClaimType;
                numberOfPropertiesWritten++;
            }

            if (!string.IsNullOrWhiteSpace(_label))
            {
                mask |= SerializationMask.HasLabel;
                numberOfPropertiesWritten++;
            }

            if (_instanceClaims.Count > 0)
            {
                mask |= SerializationMask.HasClaims;
                numberOfPropertiesWritten++;
            }

            if (_actor != null)
            {
                mask |= SerializationMask.Actor;
                numberOfPropertiesWritten++;
            }

            if (userData != null && userData.Length > 0)
            {
                numberOfPropertiesWritten++;
                mask |= SerializationMask.UserData;
            }

            writer.Write((int)mask);
            writer.Write(numberOfPropertiesWritten);
            if ((mask & SerializationMask.AuthenticationType) == SerializationMask.AuthenticationType)
            {
                writer.Write(_authenticationType);
            }

            if ((mask & SerializationMask.BootstrapConext) == SerializationMask.BootstrapConext)
            {
                writer.Write(_bootstrapContext as string);
            }

            if ((mask & SerializationMask.NameClaimType) == SerializationMask.NameClaimType)
            {
                writer.Write(_nameClaimType);
            }

            if ((mask & SerializationMask.RoleClaimType) == SerializationMask.RoleClaimType)
            {
                writer.Write(_roleClaimType);
            }

            if ((mask & SerializationMask.HasLabel) == SerializationMask.HasLabel)
            {
                writer.Write(_label);
            }

            if ((mask & SerializationMask.HasClaims) == SerializationMask.HasClaims)
            {
                writer.Write(_instanceClaims.Count);
                foreach (var claim in _instanceClaims)
                {
                    claim.WriteTo(writer);
                }
            }

            if ((mask & SerializationMask.Actor) == SerializationMask.Actor)
            {
                _actor.WriteTo(writer);
            }

            if ((mask & SerializationMask.UserData) == SerializationMask.UserData)
            {
                writer.Write(userData.Length);
                writer.Write(userData);
            }

            writer.Flush();
        }