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ParameterType.F ullName returns "System.Boolean &" explain why


I am using reflections to get Parameters and their types of a COM Interop
Assembly method. ParameterType.F ullName returns "System.Boolean &" what's the
significance of & at the end?

Here's my code:
/* Project1.Class1 Class has 1 method doA, second param is boolean type */
//Get Type from Assebly
Assembly asm = Assembly.Load(" Interop.Project 1");
//Create Type instance
Type asmT = asm.GetType("Pr oject1.Class1Cl ass");

//get Method Info and Parameter info
MethodInfo mInfo = asmT.GetMethod( "doA");
ParameterInfo[] paramsInfo = mInfo.GetParame ters();
//display type full name
MessageBox.Show (paramsInfo[1].ParameterType. FullName);
Dec 16 '05 #1
2 4068
I am using reflections to get Parameters and their types of a COM Interop
Assembly method. ParameterType.F ullName returns "System.Boolean &" what's the
significance of & at the end?

It indicates that it's a byref parameter (like if you use the ref or
out modifiers in C#). paramsInfo[1].ParameterType. IsByRef should be

Mattias Sjögren [C# MVP] mattias @ mvps.org
http://www.msjogren.net/dotnet/ | http://www.dotnetinterop.com
Please reply only to the newsgroup.
Dec 16 '05 #2
On Fri, 16 Dec 2005 11:52:02 -0800, "Lenn"
<Le**@discussio ns.microsoft.co m> wrote:

I am using reflections to get Parameters and their types of a COM Interop
Assembly method. ParameterType.F ullName returns "System.Boolean &" what's the
significance of & at the end?

The COM Interop Assembly may have been written in C++. In C++ an "&"
at the end of a method parameter indicates a reference parameter. In
C# this would be "ref System.Boolean" .


The ultimate truth is that there is no ultimate truth
Dec 17 '05 #3

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