ExpressionType
Describes the node types for the nodes of an expression tree.
Add = 0
An addition operation, such as a + b, without overflow checking, for numeric operands.
AddAssign = 63
An addition compound assignment operation, such as (a += b), without overflow checking, for numeric operands.
AddAssignChecked = 74
An addition compound assignment operation, such as (a += b), with overflow checking, for numeric operands.
AddChecked = 1
An addition operation, such as (a + b), with overflow checking, for numeric operands.
And = 2
A bitwise or logical AND operation, such as (a & b) in C# and (a And b) in Visual Basic.
AndAlso = 3
A 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.
AndAssign = 64
A bitwise or logical AND compound assignment operation, such as (a &= b) in C#.
ArrayIndex = 5
An indexing operation in a one-dimensional array, such as array[index] in C# or array(index) in Visual Basic.
ArrayLength = 4
An operation that obtains the length of a one-dimensional array, such as array.Length.
Assign = 46
An assignment operation, such as (a = b).
Block = 47
A block of expressions.
Call = 6
A method call, such as in the obj.sampleMethod() expression.
Coalesce = 7
A node that represents a null coalescing operation, such as (a ?? b) in C# or If(a, b) in Visual Basic.
Conditional = 8
A conditional operation, such as a > b ? a : b in C# or If(a > b, a, b) in Visual Basic.
Constant = 9
A constant value.
Convert = 10
A 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.
ConvertChecked = 11
A 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.
DebugInfo = 48
Debugging information.
Decrement = 49
A unary decrement operation, such as (a - 1) in C# and Visual Basic. The object a should not be modified in place.
Default = 51
A default value.
Divide = 12
A division operation, such as (a / b), for numeric operands.
DivideAssign = 65
An division compound assignment operation, such as (a /= b), for numeric operands.
Dynamic = 50
A dynamic operation.
Equal = 13
A node that represents an equality comparison, such as (a == b) in C# or (a = b) in Visual Basic.
ExclusiveOr = 14
A bitwise or logical XOR operation, such as (a ^ b) in C# or (a Xor b) in Visual Basic.
ExclusiveOrAssign = 66
A bitwise or logical XOR compound assignment operation, such as (a ^= b) in C#.
Extension = 52
An extension expression.
Goto = 53
A "go to" expression, such as goto Label in C# or GoTo Label in Visual Basic.
GreaterThan = 15
A "greater than" comparison, such as (a > b).
GreaterThanOrEqual = 16
A "greater than or equal to" comparison, such as (a >= b).
Increment = 54
A unary increment operation, such as (a + 1) in C# and Visual Basic. The object a should not be modified in place.
Index = 55
An index operation or an operation that accesses a property that takes arguments.
Invoke = 17
An operation that invokes a delegate or lambda expression, such as sampleDelegate.Invoke().
IsFalse = 84
A false condition value.
IsTrue = 83
A true condition value.
Label = 56
A label.
Lambda = 18
A lambda expression, such as a => a + a in C# or Function(a) a + a in Visual Basic.
LeftShift = 19
A bitwise left-shift operation, such as (a << b).
LeftShiftAssign = 67
A bitwise left-shift compound assignment, such as (a <<= b).
LessThan = 20
A "less than" comparison, such as (a < b).
LessThanOrEqual = 21
A "less than or equal to" comparison, such as (a <= b).
ListInit = 22
An 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.
Loop = 58
A loop, such as for or while.
MemberAccess = 23
An operation that reads from a field or property, such as obj.SampleProperty.
MemberInit = 24
An 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.
Modulo = 25
An arithmetic remainder operation, such as (a % b) in C# or (a Mod b) in Visual Basic.
ModuloAssign = 68
An arithmetic remainder compound assignment operation, such as (a %= b) in C#.
Multiply = 26
A multiplication operation, such as (a * b), without overflow checking, for numeric operands.
MultiplyAssign = 69
A multiplication compound assignment operation, such as (a *= b), without overflow checking, for numeric operands.
A multiplication compound assignment operation, such as (a *= b), that has overflow checking, for numeric operands.
MultiplyChecked = 27
An multiplication operation, such as (a * b), that has overflow checking, for numeric operands.
Negate = 28
An arithmetic negation operation, such as (-a). The object a should not be modified in place.
NegateChecked = 30
An arithmetic negation operation, such as (-a), that has overflow checking. The object a should not be modified in place.
New = 31
An operation that calls a constructor to create a new object, such as new SampleType().
NewArrayBounds = 33
An 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.
NewArrayInit = 32
An 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.
Not = 34
A 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.
NotEqual = 35
An inequality comparison, such as (a != b) in C# or (a <> b) in Visual Basic.
OnesComplement = 82
A ones complement operation, such as (~a) in C#.
Or = 36
A bitwise or logical OR operation, such as (a | b) in C# or (a Or b) in Visual Basic.
OrAssign = 70
A bitwise or logical OR compound assignment, such as (a |= b) in C#.
OrElse = 37
A short-circuiting conditional OR operation, such as (a || b) in C# or (a OrElse b) in Visual Basic.
Parameter = 38
A reference to a parameter or variable that is defined in the context of the expression. For more information, see ParameterExpression.
PostDecrementAssign = 80
A unary postfix decrement, such as (a--). The object a should be modified in place.
PostIncrementAssign = 79
A unary postfix increment, such as (a++). The object a should be modified in place.
Power = 39
A mathematical operation that raises a number to a power, such as (a ^ b) in Visual Basic.
PowerAssign = 71
A compound assignment operation that raises a number to a power, such as (a ^= b) in Visual Basic.
PreDecrementAssign = 78
A unary prefix decrement, such as (--a). The object a should be modified in place.
PreIncrementAssign = 77
A unary prefix increment, such as (++a). The object a should be modified in place.
Quote = 40
An 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.
RightShift = 41
A bitwise right-shift operation, such as (a >> b).
RightShiftAssign = 72
A bitwise right-shift compound assignment operation, such as (a >>= b).
RuntimeVariables = 57
A list of run-time variables. For more information, see RuntimeVariablesExpression.
Subtract = 42
A subtraction operation, such as (a - b), without overflow checking, for numeric operands.
SubtractAssign = 73
A subtraction compound assignment operation, such as (a -= b), without overflow checking, for numeric operands.
A subtraction compound assignment operation, such as (a -= b), that has overflow checking, for numeric operands.
SubtractChecked = 43
An arithmetic subtraction operation, such as (a - b), that has overflow checking, for numeric operands.
Switch = 59
A switch operation, such as switch in C# or Select Case in Visual Basic.
Throw = 60
An operation that throws an exception, such as throw new Exception().
Try = 61
A try-catch expression.
TypeAs = 44
An 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.
TypeEqual = 81
An exact type test.
TypeIs = 45
A type test, such as obj is SampleType in C# or TypeOf obj is SampleType in Visual Basic.
UnaryPlus = 29
A 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.
Unbox = 62
An unbox value type operation, such as unbox and unbox.any instructions in MSIL.