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MethodBuilder.SetImplementationFlags Method

Sets the implementation flags for this method.

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

public void SetImplementationFlags (
	MethodImplAttributes attributes
)
public void SetImplementationFlags (
	MethodImplAttributes attributes
)
public function SetImplementationFlags (
	attributes : MethodImplAttributes
)

Parameters

attributes

The implementation flags to set.

Exception typeCondition

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.

When you use the SetImplementationFlags method in combination with the SetCustomAttribute method, be aware of potential interactions. For example, using the SetCustomAttribute method to add the DllImportAttribute attribute also sets the MethodImplAttributes.PreserveSig flag. If you subsequently call the SetImplementationFlags method, the PreserveSig flag is overwritten. There are two ways to avoid this:

  • Call the SetImplementationFlags method before you call the SetCustomAttribute method. The SetCustomAttribute method always respects existing method implementation flags.

  • When you set implementation flags, call the GetMethodImplementationFlags method to retrieve the existing flags, use bitwise OR to add your flag, and then call the SetImplementationFlags method.

The code sample below illustrates the contextual use of the SetImplementationFlags method to describe the implementation of MSIL in a method body.

MethodBuilder myMthdBuilder = myTypeBuilder.DefineMethod("MyMethod",
                    MethodAttributes.Public,
                    CallingConventions.HasThis,
                    typeof(int),
                    new Type[] { typeof(int),
                             typeof(int) });    

// Specifies that the dynamic method declared above has a an MSIL implementation,
    // is managed, synchronized (single-threaded) through the body, and that it 
// cannot be inlined.
 
myMthdBuilder.SetImplementationFlags(MethodImplAttributes.IL |
                     MethodImplAttributes.Managed |
                     MethodImplAttributes.Synchronized |
                     MethodImplAttributes.NoInlining);

// Create an ILGenerator for the MethodBuilder and emit MSIL here ...


MethodBuilder myMthdBuilder =
    myTypeBuilder.DefineMethod(
    "MyMethod", MethodAttributes.Public, CallingConventions.HasThis,
    int.class.ToType(), new Type[] { int.class.ToType(),
    int.class.ToType()});
// Specifies that the dynamic method declared above has a an MSIL 
// implementation, is managed, synchronized (single-threaded) through 
// the body, and that it cannot be inlined.
myMthdBuilder.SetImplementationFlags((MethodImplAttributes.IL 
        | MethodImplAttributes.Managed 
        | MethodImplAttributes.Synchronized 
        | MethodImplAttributes.NoInlining));
// Create an ILGenerator for the MethodBuilder and emit MSIL here ...

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

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

.NET Framework

Supported in: 2.0, 1.1, 1.0

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