1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
 

public static int DoIt()
{
      using (SqlConnection myCon = new SqlConnection(...))
      {
            
           int x = 0;

          // do something and return x
          //...

          return x;

      }

}

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
 

.method public hidebysig static int32  DoIt() cil managed
{
  // Code size       33 (0x21)
  .maxstack  2
  .locals init ([0] class [System.Data]System.Data.SqlClient.SqlConnection myCon,
           [1] int32 x,
           [2] int32 CS$1$0000,
           [3] bool CS$4$0001)
  IL_0000:  nop
  IL_0001:  newobj     instance void [System.Data]System.Data.SqlClient.SqlConnection::.ctor()
  IL_0006:  stloc.0
  .try
  {
    IL_0007:  nop
    IL_0008:  ldc.i4.0
    IL_0009:  stloc.1
    IL_000a:  ldloc.1
    IL_000b:  stloc.2
    IL_000c:  leave.s    IL_001e
  }  // end .try
  finally
  {
    IL_000e:  ldloc.0
    IL_000f:  ldnull
    IL_0010:  ceq
    IL_0012:  stloc.3
    IL_0013:  ldloc.3
    IL_0014:  brtrue.s   IL_001d
    IL_0016:  ldloc.0
    IL_0017:  callvirt   instance void [mscorlib]System.IDisposable::Dispose()
    IL_001c:  nop
    IL_001d:  endfinally
  }  // end handler
  IL_001e:  nop
  IL_001f:  ldloc.2
  IL_0020:  ret
} // end of method Program::DoIt