private void NumerClick(object obj, string num) { if (block) { return; } if (lasEqual) { return; } writeSomething = true; if (shouldClearLine) { viev.operationText = model.startNewLine(viev.operationText); shouldClearLine = false; } viev.operationText = model.OperationLabelAddChar(viev.operationText, num[0]); }