Run Java on .Net - convert java to c#

 must tool to check 

http://www.ikvm.net/index.html

IKVM.NET is an implementation of Java for Mono and the Microsoft .NET Framework. It includes the following components:

• A Java Virtual Machine implemented in .NET
• A .NET implementation of the Java class libraries
• Tools that enable Java and .NET interoperability

i have a jar file with log4j -  i get error 

warning IKVMC0111: Emitted java.lang.NoClassDefFoundError in     ("org.apache.log4j.MDC")

when using 

ikvmc -target:library  123.jar

so :

i download log4j 

convert it to .net dll

ikvmc -target:library log4j-1.2.17.jar

convert 123.jar file to .net dll + add reference to log4j

ikvmc -target:library  123.jar  -r:log4j-1.2.17.dll

and its worked !!!

Happy converting

Yaniv Tzanany