Mono.CSharp.Foreach.CollectionForeach.RuntimeDispose.CreateDisposeCall C# (CSharp) Method

				protected override Statement CreateDisposeCall (BlockContext bc, LocalVariable lv)
				{
					if (TypeManager.void_dispose_void == null) {
						TypeManager.void_dispose_void = TypeManager.GetPredefinedMethod (
							TypeManager.idisposable_type, "Dispose", loc, TypeSpec.EmptyTypes);
					}

					//
					// Fabricates code like
					//
					// if ((temp = vr as IDisposable) != null) temp.Dispose ();
					//

					var dispose_variable = LocalVariable.CreateCompilerGenerated (TypeManager.idisposable_type, bc.CurrentBlock, loc);

					var idisaposable_test = new Binary (Binary.Operator.Inequality, new CompilerAssign (
						dispose_variable.CreateReferenceExpression (bc, loc),
						new As (lv.CreateReferenceExpression (bc, loc), new TypeExpression (dispose_variable.Type, loc), loc),
						loc), new NullLiteral (loc), loc);

					var dispose_mg = MethodGroupExpr.CreatePredefined (TypeManager.void_dispose_void, TypeManager.idisposable_type, loc);
					dispose_mg.InstanceExpression = dispose_variable.CreateReferenceExpression (bc, loc);

					Statement dispose = new StatementExpression (new Invocation (dispose_mg, null));
					return new If (idisaposable_test, dispose, loc);
				}
			}