ObservableCollections

NOTE: when replace successfully, list has been sorted.

ReadOnly cloned collection.

Contract: IsSingleItem ? (NewItem, OldItem) : (NewItems, OldItems) Action.Add NewItem, NewItems, NewStartingIndex Action.Remove OldItem, OldItems, OldStartingIndex Action.Replace NewItem, NewItems, OldItem, OldItems, (NewStartingIndex, OldStartingIndex = samevalue) Action.Move NewStartingIndex, OldStartingIndex Action.Reset SortOperation(IsClear, IsReverse, Comparer)

Create faster, compact INotifyCollectionChanged view, however it does not support ***Range.

similar as AsSpan but modify size to create fixed-size span.

An attribute that allows parameters to receive the expression of other parameters.

Initializes a new instance of the class.

The condition parameter value.

Gets the parameter name the expression is retrieved from.

Initialize the attribute to refer to the method on the type.

The type of the builder to use to construct the collection. The name of the method on the builder to use to construct the collection. must refer to a static method that accepts a single parameter of type and returns an instance of the collection being built containing a copy of the data from that span. In future releases of .NET, additional patterns may be supported.

Gets the type of the builder to use to construct the collection.

Gets the name of the method on the builder to use to construct the collection.

This should match the metadata name of the target method. For example, this might be ".ctor" if targeting the type's constructor.

Indicates that compiler support for a particular feature is required for the location where this attribute is applied.

Creates a new instance of the type.

The name of the feature to indicate.

The name of the compiler feature.

If true, the compiler can choose to allow access to the location where this attribute is applied if it does not understand .

The used for the ref structs C# feature.

The used for the required members C# feature.

Indicates which arguments to a method involving an interpolated string handler should be passed to that handler.

Initializes a new instance of the class.

The name of the argument that should be passed to the handler. may be used as the name of the receiver in an instance method.

Initializes a new instance of the class.

The names of the arguments that should be passed to the handler. may be used as the name of the receiver in an instance method.

Gets the names of the arguments that should be passed to the handler.

may be used as the name of the receiver in an instance method.

Indicates the attributed type is to be used as an interpolated string handler.

Reserved to be used by the compiler for tracking metadata. This class should not be used by developers in source code.

Used to indicate to the compiler that a method should be called in its containing module's initializer.

When one or more valid methods with this attribute are found in a compilation, the compiler will emit a module initializer which calls each of the attributed methods. Certain requirements are imposed on any method targeted with this attribute: - The method must be `static`. - The method must be an ordinary member method, as opposed to a property accessor, constructor, local function, etc. - The method must be parameterless. - The method must return `void`. - The method must not be generic or be contained in a generic type. - The method's effective accessibility must be `internal` or `public`. The specification for module initializers in the .NET runtime can be found here: https://github.com/dotnet/runtime/blob/main/docs/design/specs/Ecma-335-Augments.md#module-initializer

Specifies that a type has required members or that a member is required.

Reserved for use by a compiler for tracking metadata. This attribute should not be used by developers in source code.

Used to indicate to the compiler that the .locals init flag should not be set in method headers.

Initializes a new instance of the class.

Initializes a new instance of the class with the specified message.

An optional message associated with this attribute instance.

Returns the optional message associated with this attribute instance.

Returns the optional URL associated with this attribute instance.

Indicates that an API is experimental and it may change in the future.

This attribute allows call sites to be flagged with a diagnostic that indicates that an experimental feature is used. Authors can use this attribute to ship preview features in their assemblies.

Initializes a new instance of the class, specifying the ID that the compiler will use when reporting a use of the API the attribute applies to.

The ID that the compiler will use when reporting a use of the API the attribute applies to.

Gets the ID that the compiler will use when reporting a use of the API the attribute applies to.

The unique diagnostic ID. The diagnostic ID is shown in build output for warnings and errors. This property represents the unique ID that can be used to suppress the warnings or errors, if needed.

Gets or sets the URL for corresponding documentation. The API accepts a format string instead of an actual URL, creating a generic URL that includes the diagnostic ID.

The format string that represents a URL to corresponding documentation. An example format string is https://contoso.com/obsoletion-warnings/{0}.

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.

Specifies that this constructor sets all required members for the current type, and callers do not need to set any required members themselves.

Specifies the syntax used in a string.

Initializes the with the identifier of the syntax used.

The syntax identifier.

Initializes the with the identifier of the syntax used.

The syntax identifier. Optional arguments associated with the specific syntax employed.

Gets the identifier of the syntax used.

Optional arguments associated with the specific syntax employed.

The syntax identifier for strings containing composite formats for string formatting.

The syntax identifier for strings containing date format specifiers.

The syntax identifier for strings containing date and time format specifiers.

The syntax identifier for strings containing format specifiers.

The syntax identifier for strings containing JavaScript Object Notation (JSON).

The syntax identifier for strings containing numeric format specifiers.

The syntax identifier for strings containing regular expressions.

The syntax identifier for strings containing time format specifiers.

The syntax identifier for strings containing format specifiers.

The syntax identifier for strings containing URIs.

The syntax identifier for strings containing XML.

Used to indicate a byref escapes and is not scoped.

There are several cases where the C# compiler treats a as implicitly - where the compiler does not allow the to escape the method. For example: for instance methods. parameters that refer to types. parameters. This attribute is used in those instances where the should be allowed to escape. Applying this attribute, in any form, has impact on consumers of the applicable API. It is necessary for API authors to understand the lifetime implications of applying this attribute and how it may impact their users.