Shell Programming and Scripting

I have a script which is reading value from property file and doing replacement in source location which contains multiple files.
property file has values

Code:

abc=xyz; yux=1;version=3.0;

bcd=123;apple==mango

when my script does search and reads value from property file.

its replacing value for varible ${abc}
to 3.0

Code:

${bcd} to mango

I am using shell script, its works fine in all other scenarios.

I am reading property file as

Code:

abc
bcd

everything on right side of = as value.

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What exactly is your problem? Please show the code, the files & structures, error msgs, ...