.NET object creation, whats faster?

Question

IS there a difference between those 2 ways of object creation?

new MyClass() { Id = 1, Code = \"Test\" };

or

MyClass c = ne         


        

Answer 1

To illustrate M Skeet's code, here's the IL (note the additional ldloc stloc for method #1)

  IL_0001:  newobj     instance void ConsoleApplication1.Program/MyClass::.ctor()
  IL_0006:  stloc.2
  IL_0007:  ldloc.2
  IL_0008:  ldc.i4.1
  IL_0009:  callvirt   instance void ConsoleApplication1.Program/MyClass::set_Id(int32)
  IL_000e:  nop
  IL_000f:  ldloc.2
  IL_0010:  ldstr      "Test"
  IL_0015:  callvirt   instance void ConsoleApplication1.Program/MyClass::set_Code(string)
  IL_001a:  nop
  IL_001b:  ldloc.2
  IL_001c:  stloc.0


  IL_001d:  newobj     instance void ConsoleApplication1.Program/MyClass::.ctor()
  IL_0022:  stloc.1
  IL_0023:  ldloc.1
  IL_0024:  ldc.i4.1
  IL_0025:  callvirt   instance void ConsoleApplication1.Program/MyClass::set_Id(int32)
  IL_002a:  nop
  IL_002b:  ldloc.1
  IL_002c:  ldstr      "Test"
  IL_0031:  callvirt   instance void ConsoleApplication1.Program/MyClass::set_Code(string)
  IL_0036:  nop