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Asked: 2026-05-31T07:35:43+00:00

public TResponse ExecuteCustomMessage<TResponse>(IModbusMessage request) where TResponse : IModbusMessage, new() what is the above means?

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public TResponse ExecuteCustomMessage<TResponse>(IModbusMessage request)
    where TResponse : IModbusMessage, new()

what is the above means? I have never see anything like that before, although I’ve been coding in C# for couple of years now… It is supposed to be a function, but I am not sure what is this < > and keyword where and new() at the end…

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1 Answer

  1. Editorial Team

    It is a constraint on the TResponse generic type which implements the interface IModbusMessage and has a parameterless constructor.

    where T : (interface name) The type argument must be or implement the
    specified interface. Multiple interface constraints can be specified.
    The constraining interface can also be generic.

    where T : new() The type argument must have a public parameterless
    constructor. When used in conjunction with other constraints, the
    new() constraint must be specified last.

    Also, as others have pointed out, I recommend you read the generics docs (pointed to by SLaks in the comments).

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