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MethodBuilder.DefineParameter Method

Sets the parameter attributes and the name of a parameter of this method, or of the return value of this method. Returns a ParameterBuilder that can be used to apply custom attributes.

Namespace:  System.Reflection.Emit
Assembly:  mscorlib (in mscorlib.dll)

member DefineParameter : 
        position:int * 
        attributes:ParameterAttributes * 
        strParamName:string -> ParameterBuilder

Parameters

position
Type: System.Int32

The position of the parameter in the parameter list. Parameters are indexed beginning with the number 1 for the first parameter; the number 0 represents the return value of the method.

attributes
Type: System.Reflection.ParameterAttributes

The parameter attributes of the parameter.

strParamName
Type: System.String

The name of the parameter. The name can be the null string.

Return Value

Type: System.Reflection.Emit.ParameterBuilder
Returns a ParameterBuilder object that represents a parameter of this method or the return value of this method.

ExceptionCondition
ArgumentOutOfRangeException

The method has no parameters.

-or-

position is less than zero.

-or-

position is greater than the number of the method's parameters.

InvalidOperationException

The containing type was previously created using CreateType.

-or-

For the current method, the IsGenericMethod property is true, but the IsGenericMethodDefinition property is false.

The ParameterBuilder object returned by this method can be used to set the default value for a parameter or to apply custom attributes.

Parameter numbering begins with 1, so position is 1 for the first parameter. If position is zero, this method affects the return value.

NoteNote

In the .NET Framework versions 1.0 and 1.1, an exception is thrown if position is zero, so this method cannot be used to modify attributes of the return value in those versions.

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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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