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TryCastExtensionTryCastTValue Method

Creates the TryCastWorkerTValue object to get a fluent notation for try-casting types.

This pattern avoids heavily nested if (class is type) / else chains when testing for more than one possible cast.


Namespace: TomsToolbox.Desktop
Assembly: TomsToolbox.Desktop (in TomsToolbox.Desktop.dll) Version: 2.21.0+44d18b541fc9419ec3c549350a832394661b2a4d
XMLNS for XAML: Not mapped to an xmlns.
Syntax
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public static TryCastWorker<TValue> TryCast<TValue>(
	this TValue value
)
where TValue : class

Parameters

value  TValue
The value.

Type Parameters

TValue
The type of the value.

Return Value

TryCastWorkerTValue
The TryCastWorkerTValue object.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type TValue. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).
Remarks
This has been somewhat superseded by the new C# language feature switch() { case Type variable: ... }, but for some complex scenarios it might still have some advantages.
Example
C#
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schedule.TryCast()
    .When<SingleSchedule>(x => x.Remove())
    .When<RecurrentSchedule>(x = > x.AddExceptionDate(date))
    .ElseThrow();
See Also