C# test if object or type implements interface

September 29, 2013 C# Snippet

If you have a type or an instance you can easily check if they support a specific interface.

To test if an object implements a certain interface:

if(myObject is IMyInterface) {
  // object myObject implements IMyInterface
}

To test if a type implements a certain interface:

if(typeof(IMyInterface).IsAssignableFrom(typeof(MyType))) {
  // type MyType implements IMyInterface
}

If you got a generic object and want to do a cast as well as a check if the interface you cast to is implemented the code is:


var myCastedObject = myObject as IMyInterface;

if(myCastedObject != null) {
  // object myObject implements IMyInterface
}

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