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Expression.Call Method (Expression, String, Type[], Expression[])

Creates a MethodCallExpression that represents a call to an instance method by calling the appropriate factory method.

Namespace:  System.Linq.Expressions
Assembly:  System.Core (in System.Core.dll)

public static MethodCallExpression Call(
	Expression instance,
	string methodName,
	Type[] typeArguments,
	params Expression[] arguments
)

Parameters

instance
Type: System.Linq.Expressions.Expression
An Expression whose Type property value will be searched for a specific method.
methodName
Type: System.String
The name of the method.
typeArguments
Type: System.Type[]
An array of Type objects that specify the type parameters of the generic method. This argument should be null when methodName specifies a non-generic method.
arguments
Type: System.Linq.Expressions.Expression[]
An array of Expression objects that represents the arguments to the method.

Return Value

Type: System.Linq.Expressions.MethodCallExpression
A MethodCallExpression that has the NodeType property equal to Call, the Object property equal to instance, Method set to the MethodInfo that represents the specified instance method, and Arguments set to the specified arguments.

ExceptionCondition
ArgumentNullException

instance or methodName is null.

InvalidOperationException

No method whose name is methodName, whose type parameters match typeArguments, and whose parameter types match arguments is found in instance.Type or its base types.

-or-

More than one method whose name is methodName, whose type parameters match typeArguments, and whose parameter types match arguments is found in instance.Type or its base types.

The Type property of the resulting MethodCallExpression is equal to the return type of the method denoted by methodName.

.NET Framework

Supported in: 4, 3.5

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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