System.Data.Common.ADP.IsNullOrSqlType C# (CSharp) Method

        static internal void IsNullOrSqlType(object value, out bool isNull, out bool isSqlType)
        {
            if ((value == null) || (value == DBNull.Value))
            {
                isNull = true;
                isSqlType = false;
            }
            else
            {
                INullable nullable = (value as INullable);
                if (nullable != null)
                {
                    isNull = nullable.IsNull;
                    // Duplicated from DataStorage.cs
                    // For back-compat, SqlXml is not in this list
                    isSqlType = ((value is SqlBinary) ||
                                (value is SqlBoolean) ||
                                (value is SqlByte) ||
                                (value is SqlBytes) ||
                                (value is SqlChars) ||
                                (value is SqlDateTime) ||
                                (value is SqlDecimal) ||
                                (value is SqlDouble) ||
                                (value is SqlGuid) ||
                                (value is SqlInt16) ||
                                (value is SqlInt32) ||
                                (value is SqlInt64) ||
                                (value is SqlMoney) ||
                                (value is SqlSingle) ||
                                (value is SqlString));
                }
                else
                {
                    isNull = false;
                    isSqlType = false;
                }
            }
        }