Type::IsLayoutSequential Property
Gets a value indicating whether the fields of the current type are laid out sequentially, in the order that they were defined or emitted to the metadata.
Assembly: mscorlib (in mscorlib.dll)
Property Value
Type: System::Booleantrue if the Attributes property of the current type includes TypeAttributes::SequentialLayout; otherwise, false.
Implements
_Type::IsLayoutSequentialThis property is provided as a convenience. Alternatively, you can use the TypeAttributes::LayoutMaskenumeration value to select the type layout attributes, and then test whether TypeAttributes::SequentialLayout is set. The TypeAttributes::AutoLayout, TypeAttributes::ExplicitLayout, and TypeAttributes::SequentialLayout enumeration values indicate the way the fields of the type are laid out in memory.
For dynamic types, you can specify TypeAttributes::SequentialLayout when you create the type. In code, apply the StructLayoutAttribute attribute with the LayoutKind::Sequential enumeration value to the type, to specify that layout is sequential.
Note |
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You cannot use the GetCustomAttributes method to determine whether the StructLayoutAttribute has been applied to a type. |
For more information, see section 9.1.2 of the specification for the Common Language Infrastructure (CLI) documentation, "Partition II: Metadata Definition and Semantics". The documentation is available online; see ECMA C# and Common Language Infrastructure Standards on MSDN and Standard ECMA-335 - Common Language Infrastructure (CLI) on the Ecma International Web site.
If the current Type represents a constructed generic type, this property applies to the generic type definition from which the type was constructed. For example, if the current Type represents MyGenericType<int> (MyGenericType(Of Integer) in Visual Basic), the value of this property is determined by MyGenericType<T>.
If the current Type represents a type parameter in the definition of a generic type or generic method, this property always returns false.
The following example creates an instance of a class for which the LayoutKind::Sequentialenumeration value in the StructLayoutAttribute class has been set, checks for the IsLayoutSequential property, and displays the result.
#using <System.dll> using namespace System; using namespace System::Reflection; using namespace System::ComponentModel; using namespace System::Runtime::InteropServices; ref class MyTypeSequential1{}; [StructLayoutAttribute(LayoutKind::Sequential)] ref class MyTypeSequential2{}; int main() { try { // Create an instance of myTypeSeq1. MyTypeSequential1^ myObj1 = gcnew MyTypeSequential1; // Check for and display the SequentialLayout attribute. Console::WriteLine( "\nThe object myObj1 has IsLayoutSequential: {0}.", myObj1->GetType()->IsLayoutSequential ); // Create an instance of 'myTypeSeq2' class. MyTypeSequential2^ myObj2 = gcnew MyTypeSequential2; // Check for and display the SequentialLayout attribute. Console::WriteLine( "\nThe object myObj2 has IsLayoutSequential: {0}.", myObj2->GetType()->IsLayoutSequential ); } catch ( Exception^ e ) { Console::WriteLine( "\nAn exception occurred: {0}", e->Message ); } }
Available since 1.1
Windows Phone Silverlight
Available since 8.0
