See the pic:

I know gradients, but in this pic, the gradient border is irregular, just like pouring water.
Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
I think you’re referring to a “gradient” — there is a
LinearGradientBrushclass that you can use for this purpose; you can also find an example on MSDN: Creating a Linear Gradient.