an error that faces me when i try to open any project

here is the pics of the error
when i try to debug a project fom c#
it gives me that error
or many sources
any solutions ??

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solved
request #close

how did u solved this please anyone answer im using windows 7 i get this error predefined type 'system.object' is not defined or imported in c# build

Quote:

Originally Posted by marcbacor6666 how did u solved this please anyone answer im using windows 7 i get this error predefined type 'system.object' is not defined or imported in c# build

I had the same issue a few weeks ago and adding:
<Reference Include="mscorlib" />
To the csproj file fixed it.

can u give explain to me how to add that? or please post ur csprof where u put mscorlib

Quote:

Originally Posted by marcbacor6666 can u give explain to me how to add that? or please post ur csprof where u put mscorlib

Open it with notepad or something and add it where the other references are.