Help for the following problem :- problem occur when launching application

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C#

Problem Event Name: CLR20r3
Problem Signature 01: abc
Problem Signature 02: 1.0.0.0
Problem Signature 03: 53f64325
Problem Signature 04: abc
Problem Signature 05: 1.0.0.0
Problem Signature 06: 53f64325
Problem Signature 07: 13c
Problem Signature 08: 1f
Problem Signature 09: System.MissingMethodException
OS Version: 6.1.7600.2.0.0.256.1
Locale ID: 1033
Additional Information 1: 0a9e
Additional Information 2: 0a9e372d3b4ad19135b953a78882e789
Additional Information 3: 0a9e
Additional Information 4: 0a9e372d3b4ad19135b953a78882e789