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ExpressionType Enumeration

Describes the node types for the nodes of an expression tree.

Namespace:  System.Linq.Expressions
Assembly:  System.Core (in System.Core.dll)
public enum ExpressionType
Member nameDescription
Supported by Silverlight for Windows PhoneAddAn addition operation, such as a + b, without overflow checking, for numeric operands.
Supported by Silverlight for Windows PhoneAddCheckedAn addition operation, such as (a + b), with overflow checking, for numeric operands.
Supported by Silverlight for Windows PhoneAndA bitwise or logical AND operation, such as (a & b) in C# and (a And b) in Visual Basic.
Supported by Silverlight for Windows PhoneAndAlsoA conditional AND operation that evaluates the second operand only if the first operand evaluates to true. It corresponds to (a && b) in C# and (a AndAlso b) in Visual Basic.
Supported by Silverlight for Windows PhoneArrayLengthAn operation that obtains the length of a one-dimensional array, such as array.Length.
Supported by Silverlight for Windows PhoneArrayIndexAn indexing operation in a one-dimensional array, such as array[index] in C# or array(index) in Visual Basic.
Supported by Silverlight for Windows PhoneCallA method call, such as in the obj.sampleMethod() expression.
Supported by Silverlight for Windows PhoneCoalesceA node that represents a null coalescing operation, such as (a ?? b) in C# or If(a, b) in Visual Basic.
Supported by Silverlight for Windows PhoneConditionalA conditional operation, such as a > b ? a : b in C# or If(a > b, a, b) in Visual Basic.
Supported by Silverlight for Windows PhoneConstantA constant value.
Supported by Silverlight for Windows PhoneConvertA cast or conversion operation, such as (SampleType)obj in C#or CType(obj, SampleType) in Visual Basic. For a numeric conversion, if the converted value is too large for the destination type, no exception is thrown.
Supported by Silverlight for Windows PhoneConvertCheckedA cast or conversion operation, such as (SampleType)obj in C#or CType(obj, SampleType) in Visual Basic. For a numeric conversion, if the converted value does not fit the destination type, an exception is thrown.
Supported by Silverlight for Windows PhoneDivideA division operation, such as (a / b), for numeric operands.
Supported by Silverlight for Windows PhoneEqualA node that represents an equality comparison, such as (a == b) in C# or (a = b) in Visual Basic.
Supported by Silverlight for Windows PhoneExclusiveOrA bitwise or logical XOR operation, such as (a ^ b) in C# or (a Xor b) in Visual Basic.
Supported by Silverlight for Windows PhoneGreaterThanA "greater than" comparison, such as (a > b).
Supported by Silverlight for Windows PhoneGreaterThanOrEqualA "greater than or equal to" comparison, such as (a >= b).
Supported by Silverlight for Windows PhoneInvokeAn operation that invokes a delegate or lambda expression, such as sampleDelegate.Invoke().
Supported by Silverlight for Windows PhoneLambdaA lambda expression, such as a => a + a in C# or Function(a) a + a in Visual Basic.
Supported by Silverlight for Windows PhoneLeftShiftA bitwise left-shift operation, such as (a << b).
Supported by Silverlight for Windows PhoneLessThanA "less than" comparison, such as (a < b).
Supported by Silverlight for Windows PhoneLessThanOrEqualA "less than or equal to" comparison, such as (a <= b).
Supported by Silverlight for Windows PhoneListInitAn operation that creates a new IEnumerable object and initializes it from a list of elements, such as new List<SampleType>(){ a, b, c } in C# or Dim sampleList = { a, b, c } in Visual Basic.
Supported by Silverlight for Windows PhoneMemberAccessAn operation that reads from a field or property, such as obj.SampleProperty.
Supported by Silverlight for Windows PhoneMemberInitAn operation that creates a new object and initializes one or more of its members, such as new Point { X = 1, Y = 2 } in C# or New Point With {.X = 1, .Y = 2} in Visual Basic.
Supported by Silverlight for Windows PhoneModuloAn arithmetic remainder operation, such as (a % b) in C# or (a Mod b) in Visual Basic.
Supported by Silverlight for Windows PhoneMultiplyA multiplication operation, such as (a * b), without overflow checking, for numeric operands.
Supported by Silverlight for Windows PhoneMultiplyCheckedAn multiplication operation, such as (a * b), that has overflow checking, for numeric operands.
Supported by Silverlight for Windows PhoneNegateAn arithmetic negation operation, such as (-a). The object a should not be modified in place.
Supported by Silverlight for Windows PhoneUnaryPlusA unary plus operation, such as (+a). The result of a predefined unary plus operation is the value of the operand, but user-defined implementations might have unusual results.
Supported by Silverlight for Windows PhoneNegateCheckedAn arithmetic negation operation, such as (-a), that has overflow checking. The object a should not be modified in place.
Supported by Silverlight for Windows PhoneNewAn operation that calls a constructor to create a new object, such as new SampleType().
Supported by Silverlight for Windows PhoneNewArrayInitAn operation that creates a new one-dimensional array and initializes it from a list of elements, such as new SampleType[]{a, b, c} in C# or New SampleType(){a, b, c} in Visual Basic.
Supported by Silverlight for Windows PhoneNewArrayBoundsAn operation that creates a new array, in which the bounds for each dimension are specified, such as new SampleType[dim1, dim2] in C# or New SampleType(dim1, dim2) in Visual Basic.
Supported by Silverlight for Windows PhoneNotA bitwise complement or logical negation operation. In C#, it is equivalent to (~a) for integral types and to (!a) for Boolean values. In Visual Basic, it is equivalent to (Not a). The object a should not be modified in place.
Supported by Silverlight for Windows PhoneNotEqualAn inequality comparison, such as (a != b) in C# or (a <> b) in Visual Basic.
Supported by Silverlight for Windows PhoneOrA bitwise or logical OR operation, such as (a | b) in C# or (a Or b) in Visual Basic.
Supported by Silverlight for Windows PhoneOrElseA short-circuiting conditional OR operation, such as (a || b) in C# or (a OrElse b) in Visual Basic.
Supported by Silverlight for Windows PhoneParameterA reference to a parameter or variable that is defined in the context of the expression. For more information, see ParameterExpression.
Supported by Silverlight for Windows PhonePowerA mathematical operation that raises a number to a power, such as (a ^ b) in Visual Basic.
Supported by Silverlight for Windows PhoneQuoteAn expression that has a constant value of type Expression. A Quote node can contain references to parameters that are defined in the context of the expression it represents.
Supported by Silverlight for Windows PhoneRightShiftA bitwise right-shift operation, such as (a >> b).
Supported by Silverlight for Windows PhoneSubtractA subtraction operation, such as (a - b), without overflow checking, for numeric operands.
Supported by Silverlight for Windows PhoneSubtractCheckedAn arithmetic subtraction operation, such as (a - b), that has overflow checking, for numeric operands.
Supported by Silverlight for Windows PhoneTypeAsAn explicit reference or boxing conversion in which null is supplied if the conversion fails, such as (obj as SampleType) in C# or TryCast(obj, SampleType) in Visual Basic.
Supported by Silverlight for Windows PhoneTypeIsA type test, such as obj is SampleType in C# or TypeOf obj is SampleType in Visual Basic.
AssignAn assignment operation, such as (a = b).
BlockA block of expressions.
DebugInfoDebugging information.
DecrementA unary decrement operation, such as (a - 1) in C# and Visual Basic. The object a should not be modified in place.
DynamicA dynamic operation.
DefaultA default value.
ExtensionAn extension expression.
GotoA "go to" expression, such as goto Label in C# or GoTo Label in Visual Basic.
IncrementA unary increment operation, such as (a + 1) in C# and Visual Basic. The object a should not be modified in place.
IndexAn index operation or an operation that accesses a property that takes arguments.
LabelA label.
RuntimeVariablesA list of run-time variables. For more information, see RuntimeVariablesExpression.
LoopA loop, such as for or while.
SwitchA switch operation, such as switch in C# or Select Case in Visual Basic.
ThrowAn operation that throws an exception, such as throw new Exception().
TryA try-catch expression.
UnboxAn unbox value type operation, such as unbox and unbox.any instructions in MSIL.
AddAssignAn addition compound assignment operation, such as (a += b), without overflow checking, for numeric operands.
AndAssignA bitwise or logical AND compound assignment operation, such as (a &= b) in C#.
DivideAssignAn division compound assignment operation, such as (a /= b), for numeric operands.
ExclusiveOrAssignA bitwise or logical XOR compound assignment operation, such as (a ^= b) in C#.
LeftShiftAssignA bitwise left-shift compound assignment, such as (a <<= b).
ModuloAssignAn arithmetic remainder compound assignment operation, such as (a %= b) in C#.
MultiplyAssignA multiplication compound assignment operation, such as (a *= b), without overflow checking, for numeric operands.
OrAssignA bitwise or logical OR compound assignment, such as (a |= b) in C#.
PowerAssignA compound assignment operation that raises a number to a power, such as (a ^= b) in Visual Basic.
RightShiftAssignA bitwise right-shift compound assignment operation, such as (a >>= b).
SubtractAssignA subtraction compound assignment operation, such as (a -= b), without overflow checking, for numeric operands.
AddAssignCheckedAn addition compound assignment operation, such as (a += b), with overflow checking, for numeric operands.
MultiplyAssignCheckedA multiplication compound assignment operation, such as (a *= b), that has overflow checking, for numeric operands.
SubtractAssignCheckedA subtraction compound assignment operation, such as (a -= b), that has overflow checking, for numeric operands.
PreIncrementAssignA unary prefix increment, such as (++a). The object a should be modified in place.
PreDecrementAssignA unary prefix decrement, such as (--a). The object a should be modified in place.
PostIncrementAssignA unary postfix increment, such as (a++). The object a should be modified in place.
PostDecrementAssignA unary postfix decrement, such as (a--). The object a should be modified in place.
TypeEqualAn exact type test.
OnesComplementA ones complement operation, such as (~a) in C#.
IsTrueA true condition value.
IsFalseA false condition value.

For more information about each enumeration value of this type, see the documentation on the CodePlex Web site.

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Windows Phone OS 7.0

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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