Opc.Ua.ContentFilter.ToString C# (CSharp) Method

        private static object ToString(object value, BuiltInType sourceType)
        {            
            // check for array conversions.
            Array array = value as Array;

            if (array != null)
            {
                String[] output = new String[array.Length];

                for (int ii = 0; ii < array.Length; ii++)
                {
                    output[ii] = (String)Cast(array.GetValue(ii), BuiltInType.String);
                }

                return output;
            }
            
            // handle for supported conversions.
            switch (sourceType)
            {
                case BuiltInType.String:
                {
                    return (string)value;
                }

                case BuiltInType.Boolean:
                {
                    return XmlConvert.ToString((bool)value);
                }

                case BuiltInType.SByte:
                {
                    return XmlConvert.ToString((sbyte)value); 
                }

                case BuiltInType.Byte:
                {
                    return XmlConvert.ToString((byte)value); 
                }

                case BuiltInType.Int16:
                {
                    return XmlConvert.ToString((short)value); 
                }

                case BuiltInType.UInt16:
                {
                    return XmlConvert.ToString((ushort)value); 
                }

                case BuiltInType.Int32:
                {
                    return XmlConvert.ToString((int)value); 
                }

                case BuiltInType.UInt32:
                {
                    return XmlConvert.ToString((uint)value); 
                }

                case BuiltInType.Int64:
                {
                    return XmlConvert.ToString((long)value); 
                }

                case BuiltInType.UInt64:
                {
                    return XmlConvert.ToString((ulong)value); 
                }

                case BuiltInType.Float:
                {
                    return XmlConvert.ToString((float)value); 
                }

                case BuiltInType.Double:
                {
                    return XmlConvert.ToString((double)value); 
                }

                case BuiltInType.DateTime:
                {
                    return XmlConvert.ToString((DateTime)value, XmlDateTimeSerializationMode.Unspecified); 
                }

                case BuiltInType.Guid:
                {
                    return ((Guid)value).ToString(); 
                }

                case BuiltInType.NodeId:
                {
                    return ((NodeId)value).ToString(); 
                }

                case BuiltInType.ExpandedNodeId:
                {
                    return ((ExpandedNodeId)value).ToString(); 
                }

                case BuiltInType.LocalizedText:
                {
                    return ((LocalizedText)value).Text; 
                }

                case BuiltInType.QualifiedName:
                {
                    return ((QualifiedName)value).ToString(); 
                }
            }
            
            // conversion not supported.
            return DBNull.Value;
        }