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Because this tool produces C# source code rather than a compiled dll the user is free to make any changes necessary to the code before use. So the ambiguity problem is solved by the application picking one particular .NET type to use in the P/Invoke method signature and if necessary the user can change this to the required type.
The version of a method that is executed will be determined by the object that is used to invoke it. If an object of a parent class is used to invoke the method, then the version in the parent class will be executed, but if an object of the subclass is used to invoke the method, then the version in the child class will be executed. [3]
A new pseudo-type dynamic is introduced into the C# type system. It is treated as System.Object, but in addition, any member access (method call, field, property, or indexer access, or a delegate invocation) or application of an operator on a value of such type is permitted without any type checking, and its resolution is postponed until run-time.
A feature of C# is the ability to call native code. A method signature is simply declared without a body and is marked as extern. The DllImport attribute also needs to be added to reference the desired DLL file.
As in C#, the Main method is the entry point for every program. It can have a parameter args : Array of String for passing command line arguments to the program. More types can be declared without repeating the type keyword. The implementation of the declared methods is placed in the implementation section:
For example, the Windows API is accessible via multiple languages, compilers and assemblers. C++ also allows objects to provide an implementation of the function call operation. The Standard Template Library accepts these objects (called functors) as parameters.
If a method is designed with an excessive number of overloads, it may be difficult for developers to discern which overload is being called simply by reading the code. This is particularly true if some of the overloaded parameters are of types that are inherited types of other possible parameters (for example "object").
A function call using named parameters differs from a regular function call in that the arguments are passed by associating each one with a parameter name, instead of providing an ordered list of arguments. For example, consider this Java or C# method call that doesn't use named parameters: