I recently worked with a couple customers migrating applications to .NET Core that had to make code changes to workaround BeginInvoke and EndInvoke methods on delegates not being supported on .NET Core. In this post, we’ll look at why these APIs aren’t implemented for .NET Core, 情報源: Migrating Delegate.BeginInvoke Calls for .NET Core | .NET Blog 概略 .NET CoreではdelegateのBeginInvoke、EndInvoke両メソッドの組合