Removing white spaces and spelling check for string

Question

Hi, I am making an application in which i am comparing string entered in textbox and the text property of the forms. In the text property, I have entered text without spaces. Now , I want that the string which I am entering should have all white spaces removed.And , also, if user enters wrong spelling then it should be marked red to tell the user to correct the spelling.Like we have such functionality in csharpcorner forums as well , that it makes a red line for wrong text....... Can anyone tell me how to do this................