Guidelines for using and naming variable in C#

Important Note : program readability is most important after working software.

Guidelines in using variables :

• Declare and define variable close to the where it is being used for the first time
• Use const wherever possible
• Keep variable scope as short as possible
• Try not to use global variables
• Use variable for one purpose only
• Avoid variable with hidden messages

Guidelines in naming variables :

• Code is read far more times than it is written. Favor read-time convenience over write-time convenience 
• You should not give variable name like how you name your dog
• Goodness/ Badness are determined by variable`s name
• A good variable should be readable ,memorable and appreciate
• Avoid the variables names like temp, x, y (who knows what does that mean ??)
• Try to give names to problem domain
• Come up with a standard naming conventions in cases like revenveTotal, totalRevenve.. etc.
• For naming looping indexes, Try to come up with a more descriptive names than I, j, and k
• Come with a better name than just using flag for naming status variables
• Give temporary variables more descriptive names
• Do not use negative variable names like “NotFound”, Use positive names like “Found”
• Avoid misspelled word in variable name like cnt(count) ,msg(Message)
• Do not differentiate variable names solely by capitalization