System.IO.Packaging Format error in package. Cannot modify readonly container Cannot retrieve parts of writeonly container FileMode/FileAccess for Part.GetStream is not compatible with FileMode/FileAccess used to open the Package. ContentType string cannot have leading/trailing Linear White Spaces [LWS - RFC 2616]. Unrecognized root element in Core Properties part. CreateNew not supported The target of the Core Properties relationship does not reference an existing part. Default tag is not valid per the schema. Verify that attributes are correct. More than one '{0}' property found. '{0}' element must be empty. Encoding format is not supported. Only UTF-8 and UTF-16 are supported. Relationships tag expected at root level. ';' must be followed by parameter=value pair. Semicolon separator is required between two valid parameter=value pairs. Invalid file format. Invalid file format. PackagePart subclass must implement GetContentTypeCore method if passing a null value for the content type when PackagePart object is constructed. A Linear White Space character is not valid. Parameter value must be a valid token or a quoted string as per RFC 2616. Parameter and value pair is not valid. Expected form is parameter=value. Part URI is not valid per rules defined in the Open Packaging Conventions specification. '{0}' property name is not valid in Core Properties part. Relationship Type cannot contain only spaces or be empty. A token is not valid. Refer to RFC 2616 for correct grammar of content types. ContentType string is not valid. Expected format is type/subtype. '{0}' attribute value is not valid. Relationships XML elements cannot specify attribute '{0}'. Package has more than one Core Properties relationship. TargetMode for a Core Properties relationship must be 'Internal'. Core Properties part: core property elements can contain only text data. '{0}' ID conflicts with the ID of an existing relationship for the specified source. PackageRelationship part URI syntax is not valid. '{0}' ID is not a valid XSD ID. GetContentTypeCore method cannot return null for the content type stream. Returned stream for the part is null. Package object was closed and disposed, so cannot carry out operations on this object or any stream opened on a part of this package. Override tag is not valid per the schema. Verify that attributes are correct. Part was deleted. PackageRelationship with specified ID does not exist for the source part. PackageRelationship with specified ID does not exist at the Package level. Cannot access part because parent package was closed. Cannot add part for the specified URI because it is already in the package. Specified part does not exist in the package. Cannot add part to the package. Part names cannot be derived from another part name by appending segments to it. Part URI cannot contain a Fragment component. Part URI is empty. Part URI cannot end with a forward slash. Part URI cannot start with two forward slashes. Part URI must start with a forward slash. Core Properties part: A property start-tag was expected. Unexpected number of attributes is found on '{0}'. Incorrect content type for PackageRelationship part. PackageRelationship parts cannot have relationships to other parts. PackageRelationship part URI is expected. PackageRelationship part URI is not expected. Relationships tag has extra attributes. Relationship tag contains incorrect attribute. PackageRelationship target must be relative URI if TargetMode is Internal. PackageRelationship cannot target another PackageRelationship. '{0}' tag requires a nonempty '{1}' attribute. '{0}' tag requires attribute '{1}'. Relationship tag requires attribute '{0}'. Cannot access Stream object because it was closed or disposed. Truncate not supported Required Types tag not found. Types tag has attributes not valid per the schema. Content Types XML does not match schema. Unknown xsi:type for DateTime on '{0}'. Unrecognized namespace in Core Properties part. Unrecognized tag found in Relationships XML. Cannot get stream with FileMode.Create, FileMode.CreateNew, FileMode.Truncate, FileMode.Append when access is FileAccess.Read. Cannot be an absolute URI. The Core Properties relationship references a part that has an incorrect content type. Choice cannot follow a Fallback. AlternateContent must contain one or more Choice elements. Choice is valid only in AlternateContent. There is a cycle of XML compatibility definitions, such that namespace '{0}' overrides itself. This could be due to inconsistent XmlnsCompatibilityAttributes in different assemblies. Please change the definitions to eliminate this cycle. Duplicate Preserve declaration for element {1} in namespace '{0}'. Duplicate ProcessContent declaration for element '{1}' in namespace '{0}'. Duplicate wildcard Preserve declaration for namespace '{0}'. Duplicate wildcard ProcessContent declaration for namespace '{0}'. Fallback is valid only in AlternateContent. '{0}' element is not a valid child of AlternateContent. Only Choice and Fallback elements are valid children of an AlternateContent element. '{0}' attribute is not valid for '{1}' element. '{0}' format is not valid. Cannot have both a specific and a wildcard Preserve declaration for namespace '{0}'. Cannot have both a specific and a wildcard ProcessContent declaration for namespace '{0}'. Requires attribute must contain a valid namespace prefix. '{0}' attribute value is not a valid XML name. AlternateContent must contain only one Fallback element. MustUnderstand condition failed on namespace '{0}' '{0}' namespace cannot preserve items; it must be declared Ignorable first. '{0}' namespace cannot process content; it must be declared Ignorable first. Choice must contain Requires attribute. '{0}' prefix is not defined. Unrecognized compatibility attribute '{0}'. Unrecognized Compatibility element '{0}'. Core Properties part: Text data of XSD type 'DateTime' was expected. CreateNew is not a valid FileMode for a non-empty stream. Archive file cannot be size 0. Package URI obtained from the pack URI cannot contain a Fragment. The '{0}' parameter must start with '#'. URI must contain pack:// scheme. Must have absolute URI. File contains corrupted data. Specifies that null is allowed as an input even if the corresponding type disallows it. Specifies that null is disallowed as an input even if the corresponding type allows it. Specifies that an output may be null even if the corresponding type disallows it. Specifies that an output will not be null even if the corresponding type allows it. Specifies that an input argument was not null when the call returns. Specifies that when a method returns , the parameter may be null even if the corresponding type disallows it. Initializes the attribute with the specified return value condition. The return value condition. If the method returns this value, the associated parameter may be null. Gets the return value condition. Specifies that when a method returns , the parameter will not be null even if the corresponding type allows it. Initializes the attribute with the specified return value condition. The return value condition. If the method returns this value, the associated parameter will not be null. Gets the return value condition. Specifies that the output will be non-null if the named parameter is non-null. Initializes the attribute with the associated parameter name. The associated parameter name. The output will be non-null if the argument to the parameter specified is non-null. Gets the associated parameter name. Applied to a method that will never return under any circumstance. Specifies that the method will not return if the associated Boolean parameter is passed the specified value. Initializes the attribute with the specified parameter value. The condition parameter value. Code after the method will be considered unreachable by diagnostics if the argument to the associated parameter matches this value. Gets the condition parameter value. Specifies that the method or property will ensure that the listed field and property members have not-null values. Initializes the attribute with a field or property member. The field or property member that is promised to be not-null. Initializes the attribute with the list of field and property members. The list of field and property members that are promised to be not-null. Gets field or property member names. Specifies that the method or property will ensure that the listed field and property members have not-null values when returning with the specified return value condition. Initializes the attribute with the specified return value condition and a field or property member. The return value condition. If the method returns this value, the associated parameter will not be null. The field or property member that is promised to be not-null. Initializes the attribute with the specified return value condition and list of field and property members. The return value condition. If the method returns this value, the associated parameter will not be null. The list of field and property members that are promised to be not-null. Gets the return value condition. Gets field or property member names.