icsharpcode/ILSpy — comment on commit e0e53ae650ec91e53947188997d4d8179a92f9aa
File: ICSharpCode.Decompiler/ILAst/ILAstBuilder.cs line 76
By pentp:

The `Array.Copy` overload without the sourceIndex/destionationIndex parameters uses two additional method calls to `GetLowerBound` - that's why I used the overload with indexes.