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MethodBuilder.SetParameters Method

Sets the number and types of parameters for a method.

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

public void SetParameters(
	params Type[] parameterTypes


Type: System.Type[]
An array of Type objects representing the parameter types.


The current method is generic, but is not a generic method definition. That is, the IsGenericMethod property is true, but the IsGenericMethodDefinition property is false.

If the number and types of the parameters are known when the method is defined, they can be set using any overload of the TypeBuilder.DefineMethod method that accepts an array of parameter types. However, a generic method can have parameters whose types are specified by one or more of its own generic type parameters, which cannot be defined until after the method has been defined. Use this method to set the parameter types in that case.

If the return type has optional or required custom modifiers, such as IsConst, use the SetSignature(Type, Type[], Type[], Type[], Type[][], Type[][]) method overload.

Calling this method replaces any parameter types that were set using the TypeBuilder.DefineMethod method.

The following code example uses the DefineGenericParameters method to make a method generic. The SetParameters method is used to give the method one parameter, whose type will be specified by the first generic type parameter. The SetReturnType method is used to give the method a return type, specified by the second generic type parameter.

This code is part of a larger example provided for the DefineGenericParameters method.

// Defining generic parameters for the method makes it a
// generic method. By convention, type parameters are 
// single alphabetic characters. T and U are used here.
string[] typeParamNames = {"T", "U"};
GenericTypeParameterBuilder[] typeParameters = 

// The second type parameter is constrained to be a 
// reference type.


// Set parameter types for the method. The method takes
// one parameter, and its type is specified by the first
// type parameter, T.
Type[] parms = {typeParameters[0]};

// Set the return type for the method. The return type is
// specified by the second type parameter, U.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, 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.