System.Xml.Schema.XsdValidator.CheckValue C# (CSharp) Method

        private void CheckValue(
            string              value,
            SchemaAttDef        attdef
        ) {
            try {
                reader.TypedValueObject = null;
                bool isAttn = attdef != null;
                XmlSchemaDatatype dtype = isAttn ? attdef.Datatype : context.ElementDecl.Datatype;
                if (dtype == null) {
                    return; // no reason to check
                }

                object typedValue = dtype.ParseValue(value, NameTable, nsManager, true);

                // Check special types
                XmlTokenizedType ttype = dtype.TokenizedType;
                if (ttype == XmlTokenizedType.ENTITY || ttype == XmlTokenizedType.ID || ttype == XmlTokenizedType.IDREF) {
                    if (dtype.Variety == XmlSchemaDatatypeVariety.List) {
                        string[] ss = (string[])typedValue;
                        foreach(string s in ss) {
                            ProcessTokenizedType(dtype.TokenizedType, s);
                        }
                    }
                    else {
                        ProcessTokenizedType(dtype.TokenizedType, (string)typedValue);
                    }
                }

                SchemaDeclBase decl = isAttn ? (SchemaDeclBase)attdef : (SchemaDeclBase)context.ElementDecl;
                if (!decl.CheckValue(typedValue)) {
                    if (isAttn) {
                        SendValidationEvent(Res.Sch_FixedAttributeValue, attdef.Name.ToString());
                    }
                    else {
                        SendValidationEvent(Res.Sch_FixedElementValue, XmlSchemaValidator.QNameString(context.LocalName, context.Namespace));
                    }
                }
                if (dtype.Variety == XmlSchemaDatatypeVariety.Union) {
                    typedValue = UnWrapUnion(typedValue);
                }
                reader.TypedValueObject = typedValue;
            }
            catch (XmlSchemaException) {
                if (attdef != null) {
                    SendValidationEvent(Res.Sch_AttributeValueDataType, attdef.Name.ToString());
                }
                else {
                    SendValidationEvent(Res.Sch_ElementValueDataType, XmlSchemaValidator.QNameString(context.LocalName, context.Namespace));
                }
            }
        }