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

 

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

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

static member Call : 
        instance:Expression *
        methodName:string *
        typeArguments:Type[] *
        [<ParamArrayAttribute>] arguments:Expression[] -> MethodCallExpression

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.

Exception Condition
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.

Universal Windows Platform
Available since 8
.NET Framework
Available since 3.5
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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