I am looking for a regular expression which should match the following criteria

1. Input string should not contain <followed by>
2. Input string should not contain white spaces.

Below are the examples for which regex should return true/false (Regex.IsMatch(inputString))

some<testhaspattern>thing - false
s&*<te*&#df> - false
test has space - false
<test has space and pattern> - false
test<test has space and pattern>test - false
<testhaspattern> - false
testhasnospace - true
test*has&no#space - true
test*has&no#spaces%and$special~charsare^ok - true

So regex should return false if the input string contain <pattern> or white spaces or both. 

Thanks in advance

Try:

^(?![^\s]* )(?![^<\r]*<[^>\r]*>).*$

with the multiline option set. 

You don't tell us the language/regex you are using so I have no idea if  this will work for you.

It matches all of the test cases you have provided. I have also added another which is:

test>words<pattern

for which it returns true, as do other test strings that contain only a < or a > but not both in that order.

Susan