Expression.Default Method (Type)
.NET Framework (current version)
Creates a DefaultExpression that has the Type property set to the specified type.
Assembly: System.Core (in System.Core.dll)
Parameters
- type
- Type: System.Type
Return Value
Type: System.Linq.Expressions.DefaultExpressionA DefaultExpression that has the NodeType property equal to Default and the Type property set to the specified type.
The following code example shows how to create an expression that represents a default vaule for a given type.
' Add the following directive to your file: ' Imports System.Linq.Expressions ' This expression represents the default value of a type ' (0 for integer, null for a string, and so on). Dim defaultExpr As Expression = Expression.Default( GetType(Byte) ) ' Print the expression. Console.WriteLine(defaultExpr.ToString()) ' The following statement first creates an expression tree, ' then compiles it, and then executes it. Console.WriteLine( Expression.Lambda(Of Func(Of Byte))(defaultExpr).Compile()()) ' This code example produces the following output: ' ' default(Byte) ' 0
Universal Windows Platform
Available since 8
.NET Framework
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 4.0
Windows Phone Silverlight
Available since 8.0
Windows Phone
Available since 8.1
Available since 8
.NET Framework
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 4.0
Windows Phone Silverlight
Available since 8.0
Windows Phone
Available since 8.1
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