How to display checkmark in datagrid

Question

Hi , I have created a datagrid in Windows Form using C# and .Net . I have rows and columns in that datagrid. One of the column data type is string and it displays it correctly. But under other column I want to display a checkmark ( not a checkbox) . It should be readonly. I have tried to define it is a bool and set the value to true/false , but it shows 1 or 0 respectively. Please suggest me a way to do this