Microsoft.Extensions.Features Default implementation for . Initializes a new instance of . Initializes a new instance of with the specified initial capacity. The initial number of elements that the collection can contain. is less than 0 Initializes a new instance of with the specified defaults. The feature defaults. Extension methods for getting feature from Retrieves the requested feature from the collection. Throws an if the feature is not present. The . The feature key. The requested feature. Retrieves the requested feature from the collection. Throws an if the feature is not present. feature collection The feature key. The requested feature. A cached reference to a feature. The feature type. Gets the default . Gets the feature of type from . The . The feature. Updates the reference to the feature. The to update. The instance of the feature. A reference to after the operation has completed. A reference to a collection of features. The type of the feature. Initializes a new instance of . The . Initializes the . The to initialize with. Initializes the . The to initialize with. The version of the . Gets the . Gets the revision number. This API is part of ASP.NET Core's infrastructure and should not be referenced by application code. This API is part of ASP.NET Core's infrastructure and should not be referenced by application code. This API is part of ASP.NET Core's infrastructure and should not be referenced by application code. Represents a collection of HTTP features. Indicates if the collection can be modified. Incremented for each modification and can be used to verify cached results. Gets or sets a given feature. Setting a null value removes the feature. The requested feature, or null if it is not present. Retrieves the requested feature from the collection. The feature key. The requested feature, or null if it is not present. Sets the given feature in the collection. The feature key. The feature value. Throws an if is null. The reference type argument to validate as non-null. The name of the parameter with which corresponds. Throws an if is null or empty. The argument to validate as non-null and non-empty. The name of the parameter with which corresponds. Throws an if is zero. The argument to validate as non-zero. The name of the parameter with which corresponds. Throws an if is negative. The argument to validate as non-negative. The name of the parameter with which corresponds. Throws an if is negative. The argument to validate as non-negative. The name of the parameter with which corresponds. Throws an if is negative or zero. The argument to validate as non-zero or non-negative. The name of the parameter with which corresponds. Throws an if is greater than . The argument to validate as less or equal than . The value to compare with . The name of the parameter with which corresponds. Throws an if is greater than or equal . The argument to validate as less than . The value to compare with . The name of the parameter with which corresponds. Throws an if is less than . The argument to validate as greatar than or equal than . The value to compare with . The name of the parameter with which corresponds. Throws an if is less than or equal . The argument to validate as greatar than than . The value to compare with . The name of the parameter with which corresponds. Defines a key/value pair for displaying an item of a dictionary by a debugger. 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.