Can somebody explain what IL directive "newobj" do in details?

[猿来是我]

C# code:
ClassX x = new ClassX();


IL code:
.entrypoint

// Code size 20 (0x14)

.maxstack 1

.locals init ([0] class CSharpExam.ClassX x)

IL_0000: nop

IL_0001: newobj instance void CSharpExam.ClassX::.ctor()








assembly code:00000035 mov ecx,943738h

0000003a call FFAA1FAC

0000003f mov dword ptr [ebp-44h],eax

00000042 mov ecx,dword ptr [ebp-44h]

00000045 call FFABC108

0000004a mov eax,dword ptr [ebp-44h]

0000004d mov dword ptr [ebp-40h],eax


Here I paste the asembly code of it.